Washington

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, missing negative test results, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On February 15, 2021, Washington announced that there would be no update to their data due to the President’s day holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on February 16, 2021.

On February 10, 2021, Washington announced that their cumulative hospitalizations decreased by 14, noting that “in some cases, after a detailed information review, local health departments reclassify cases as not hospitalized or hospitalized for a reason other than COVID-19.” Because Washington’s data is on a one day lag in our timeseries, this affects our data for February 11, 2021.

On February 9, 2021, Washington announced that the higher number of deaths was due to a “data processing backlog” from February 8, 2021 being cleared. Because Washington’s data is on a one day lag in our timeseries, this affects our data for February 10, 2021.

On February 8, 2021, we began reporting Positive PCR tests (specimens), and Negative PCR tests (specimens) from Washington’s downloadable data.

On February 3, 2021, Washington reported that the “higher number of new deaths is due to a data processing backlog cleared today from February 2, 2021”. Because Washington’s data is on a one day lag in our timeseries, this will affect our data for February 4, 2021.

On February 2, 2021, Washington reported that its death data would not be updated until February 3, 2021. Since WA is on a one-day lag in our time series, the death counts reported on February 4, 2021 will include two days of data. In addition, possibly because of its ongoing “processing issues” beginning November 21, 2020, Washington’s cumulative death count decreased by two on February 3, 2021.

On January 20, 2021, Washington noted that there would be no update to their deaths due to “processing issues". On January 21, 2021, Washington's data processing backlog was cleared, causing a large increase in Deaths (confirmed and probable). Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021 and January 22, 2021.

On January 20, 2021, Washington noted that their would be no update to their deaths due to “processing issues”. Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021.

On January 20, 2021, Washington noted that the day’s hospitalization data is incomplete and should be interpreted with caution. Because Washington's data is on a one day lag in our timeseries, this will affect the data for January 21, 2021.

On January 17, 2021, Washington announced that there would be no update to their data on January 18, 2021 due to the Martin Luther King Holiday. Because Washington’s data is on a one day lag in our timeseries, we will be unable to update their data on January 19, 2021.

On January 16, 2021, Washington announced that they experienced “technical challenges processing COVID-19 data” and would not be able to update their dashboard. Because Washington’s data is on a one day lag in our timeseries, this affects our data for January 17, 2021.

On January 14, 2021, Washington announced that their hospitalization data was incomplete due to an interruption in their data reporting process. On January 15, 2021, they announced that their hospitalization data was “unusually high” due to a backlog from January 13, 2021 and January 14, 2021. Because their data is on a one day lag in our timeseries, this affects our data for January 15, 2021 and January 16, 2021. To avoid recording incomplete data, we did not update their Ever hospitalized on January 15, 2021 and urge caution when interpreting their hospital data from this time period.

On January 8, 2021, Washington noted that their hospitalization data for the day was incomplete due to a data processing issue, and their Ever hospitalized decreased by 11. Because Washington’s data is on a one day lag in our timeseries, this is reflected in our data for January 9, 2021.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850. Washington noted that "As of December 10, 2020, death counts on our dashboard reflect those in our official vital records database (the Washington Health and Life Events System) where the cause of death was confirmed or suspected to have been COVID-19. If COVID-19 is later ruled out as the official cause of death, we will remove these deaths from our dashboard. We no longer report preliminary death information recorded in other systems."

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, missing negative test results, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On February 10, 2021, Washington announced that their cumulative hospitalizations decreased by 14, noting that “in some cases, after a detailed information review, local health departments reclassify cases as not hospitalized or hospitalized for a reason other than COVID-19.” Because Washington’s data is on a one day lag in our timeseries, this affects our data for February 11, 2021.

On February 9, 2021, Washington announced that the higher number of deaths was due to a “data processing backlog” from February 8, 2021 being cleared. Because Washington’s data is on a one day lag in our timeseries, this affects our data for February 10, 2021.

On February 8, 2021, we began reporting Positive PCR tests (specimens), and Negative PCR tests (specimens) from Washington’s downloadable data.

On February 3, 2021, Washington reported that the “higher number of new deaths is due to a data processing backlog cleared today from February 2, 2021”. Because Washington’s data is on a one day lag in our timeseries, this will affect our data for February 4, 2021.

On February 2, 2021, Washington reported that its death data would not be updated until February 3, 2021. Since WA is on a one-day lag in our time series, the death counts reported on February 4, 2021 will include two days of data. In addition, possibly because of its ongoing “processing issues” beginning November 21, 2020, Washington’s cumulative death count decreased by two on February 3, 2021.

On January 20, 2021, Washington noted that there would be no update to their deaths due to “processing issues". On January 21, 2021, Washington's data processing backlog was cleared, causing a large increase in Deaths (confirmed and probable). Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021 and January 22, 2021.

On January 20, 2021, Washington noted that their would be no update to their deaths due to “processing issues”. Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021.

On January 20, 2021, Washington noted that the day’s hospitalization data is incomplete and should be interpreted with caution. Because Washington's data is on a one day lag in our timeseries, this will affect the data for January 21, 2021.

On January 17, 2021, Washington announced that there would be no update to their data on January 18, 2021 due to the Martin Luther King Holiday. Because Washington’s data is on a one day lag in our timeseries, we will be unable to update their data on January 19, 2021.

On January 16, 2021, Washington announced that they experienced “technical challenges processing COVID-19 data” and would not be able to update their dashboard. Because Washington’s data is on a one day lag in our timeseries, this affects our data for January 17, 2021.

On January 14, 2021, Washington announced that their hospitalization data was incomplete due to an interruption in their data reporting process. On January 15, 2021, they announced that their hospitalization data was “unusually high” due to a backlog from January 13, 2021 and January 14, 2021. Because their data is on a one day lag in our timeseries, this affects our data for January 15, 2021 and January 16, 2021. To avoid recording incomplete data, we did not update their Ever hospitalized on January 15, 2021 and urge caution when interpreting their hospital data from this time period.

On January 8, 2021, Washington noted that their hospitalization data for the day was incomplete due to a data processing issue, and their Ever hospitalized decreased by 11. Because Washington’s data is on a one day lag in our timeseries, this is reflected in our data for January 9, 2021.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850. Washington noted that "As of December 10, 2020, death counts on our dashboard reflect those in our official vital records database (the Washington Health and Life Events System) where the cause of death was confirmed or suspected to have been COVID-19. If COVID-19 is later ruled out as the official cause of death, we will remove these deaths from our dashboard. We no longer report preliminary death information recorded in other systems."

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, missing negative test results, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On February 8, 2021, we began reporting Positive PCR tests (specimens), and Negative PCR tests (specimens) from Washington’s downloadable data.

On February 10, 2021, Washington announced that their cumulative hospitalizations decreased by 14, noting that “in some cases, after a detailed information review, local health departments reclassify cases as not hospitalized or hospitalized for a reason other than COVID-19.” Because Washington’s data is on a one day lag in our timeseries, this affects our data for February 11, 2021.

On February 9, 2021, Washington announced that the higher number of deaths was due to a “data processing backlog” from February 8, 2021 being cleared. Because Washington’s data is on a one day lag in our timeseries, this affects our data for February 10, 2021.

On February 3, 2021, Washington reported that the “higher number of new deaths is due to a data processing backlog cleared today from February 2, 2021”. Because Washington’s data is on a one day lag in our timeseries, this will affect our data for February 4, 2021.

On February 2, 2021, Washington reported that its death data would not be updated until February 3, 2021. Since WA is on a one-day lag in our time series, the death counts reported on February 4, 2021 will include two days of data. In addition, possibly because of its ongoing “processing issues” beginning November 21, 2020, Washington’s cumulative death count decreased by two on February 3, 2021.

On January 20, 2021, Washington noted that there would be no update to their deaths due to “processing issues". On January 21, 2021, Washington's data processing backlog was cleared, causing a large increase in Deaths (confirmed and probable). Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021 and January 22, 2021.

On January 20, 2021, Washington noted that their would be no update to their deaths due to “processing issues”. Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021.

On January 20, 2021, Washington noted that the day’s hospitalization data is incomplete and should be interpreted with caution. Because Washington's data is on a one day lag in our timeseries, this will affect the data for January 21, 2021.

On January 17, 2021, Washington announced that there would be no update to their data on January 18, 2021 due to the Martin Luther King Holiday. Because Washington’s data is on a one day lag in our timeseries, we will be unable to update their data on January 19, 2021.

On January 16, 2021, Washington announced that they experienced “technical challenges processing COVID-19 data” and would not be able to update their dashboard. Because Washington’s data is on a one day lag in our timeseries, this affects our data for January 17, 2021.

On January 14, 2021, Washington announced that their hospitalization data was incomplete due to an interruption in their data reporting process. On January 15, 2021, they announced that their hospitalization data was “unusually high” due to a backlog from January 13, 2021 and January 14, 2021. Because their data is on a one day lag in our timeseries, this affects our data for January 15, 2021 and January 16, 2021. To avoid recording incomplete data, we did not update their Ever hospitalized on January 15, 2021 and urge caution when interpreting their hospital data from this time period.

On January 8, 2021, Washington noted that their hospitalization data for the day was incomplete due to a data processing issue, and their Ever hospitalized decreased by 11. Because Washington’s data is on a one day lag in our timeseries, this is reflected in our data for January 9, 2021.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850. Washington noted that "As of December 10, 2020, death counts on our dashboard reflect those in our official vital records database (the Washington Health and Life Events System) where the cause of death was confirmed or suspected to have been COVID-19. If COVID-19 is later ruled out as the official cause of death, we will remove these deaths from our dashboard. We no longer report preliminary death information recorded in other systems."

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, missing negative test results, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On February 8, 2021, we began reporting Positive PCR tests (specimens), Negative PCR tests (specimens), and Negative PCR tests (cases) from Washington’s downloadable data. Previously we had cleared Washington’s Negative PCR tests (cases) timeseries to avoid a mixed unit calculation.

On February 10, 2021, Washington announced that their cumulative hospitalizations decreased by 14, noting that “in some cases, after a detailed information review, local health departments reclassify cases as not hospitalized or hospitalized for a reason other than COVID-19.” Because Washington’s data is on a one day lag in our timeseries, this affects our data for February 11, 2021.

On February 9, 2021, Washington announced that the higher number of deaths was due to a “data processing backlog” from February 8, 2021 being cleared. Because Washington’s data is on a one day lag in our timeseries, this affects our data for February 10, 2021.

On February 3, 2021, Washington reported that the “higher number of new deaths is due to a data processing backlog cleared today from February 2, 2021”. Because Washington’s data is on a one day lag in our timeseries, this will affect our data for February 4, 2021.

On February 2, 2021, Washington reported that its death data would not be updated until February 3, 2021. Since WA is on a one-day lag in our time series, the death counts reported on February 4, 2021 will include two days of data. In addition, possibly because of its ongoing “processing issues” beginning November 21, 2020, Washington’s cumulative death count decreased by two on February 3, 2021.

On January 20, 2021, Washington noted that there would be no update to their deaths due to “processing issues". On January 21, 2021, Washington's data processing backlog was cleared, causing a large increase in Deaths (confirmed and probable). Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021 and January 22, 2021.

On January 20, 2021, Washington noted that their would be no update to their deaths due to “processing issues”. Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021.

On January 20, 2021, Washington noted that the day’s hospitalization data is incomplete and should be interpreted with caution. Because Washington's data is on a one day lag in our timeseries, this will affect the data for January 21, 2021.

On January 17, 2021, Washington announced that there would be no update to their data on January 18, 2021 due to the Martin Luther King Holiday. Because Washington’s data is on a one day lag in our timeseries, we will be unable to update their data on January 19, 2021.

On January 16, 2021, Washington announced that they experienced “technical challenges processing COVID-19 data” and would not be able to update their dashboard. Because Washington’s data is on a one day lag in our timeseries, this affects our data for January 17, 2021.

On January 14, 2021, Washington announced that their hospitalization data was incomplete due to an interruption in their data reporting process. On January 15, 2021, they announced that their hospitalization data was “unusually high” due to a backlog from January 13, 2021 and January 14, 2021. Because their data is on a one day lag in our timeseries, this affects our data for January 15, 2021 and January 16, 2021. To avoid recording incomplete data, we did not update their Ever hospitalized on January 15, 2021 and urge caution when interpreting their hospital data from this time period.

On January 8, 2021, Washington noted that their hospitalization data for the day was incomplete due to a data processing issue, and their Ever hospitalized decreased by 11. Because Washington’s data is on a one day lag in our timeseries, this is reflected in our data for January 9, 2021.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850. Washington noted that "As of December 10, 2020, death counts on our dashboard reflect those in our official vital records database (the Washington Health and Life Events System) where the cause of death was confirmed or suspected to have been COVID-19. If COVID-19 is later ruled out as the official cause of death, we will remove these deaths from our dashboard. We no longer report preliminary death information recorded in other systems."

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

On February 10, 2021, Washington announced that their cumulative hospitalizations decreased by 14, noting that “in some cases, after a detailed information review, local health departments reclassify cases as not hospitalized or hospitalized for a reason other than COVID-19.” Because Washington’s data is on a one day lag in our timeseries, this affects our data for February 11, 2021.

On February 9, 2021, Washington announced that the higher number of deaths was due to a “data processing backlog” from February 8, 2021 being cleared. Because Washington’s data is on a one day lag in our timeseries, this affects our data for February 10, 2021.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, missing negative test results, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On February 3, 2021, Washington reported that the “higher number of new deaths is due to a data processing backlog cleared today from February 2, 2021”. Because Washington’s data is on a one day lag in our timeseries, this will affect our data for February 4, 2021.

On February 2, 2021, Washington reported that its death data would not be updated until February 3, 2021. Since WA is on a one-day lag in our time series, the death counts reported on February 4, 2021 will include two days of data. In addition, possibly because of its ongoing “processing issues” beginning November 21, 2020, Washington’s cumulative death count decreased by two on February 3, 2021.

On January 20, 2021, Washington noted that there would be no update to their deaths due to “processing issues". On January 21, 2021, Washington's data processing backlog was cleared, causing a large increase in Deaths (confirmed and probable). Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021 and January 22, 2021.

On January 20, 2021, Washington noted that their would be no update to their deaths due to “processing issues”. Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021.

On January 20, 2021, Washington noted that the day’s hospitalization data is incomplete and should be interpreted with caution. Because Washington's data is on a one day lag in our timeseries, this will affect the data for January 21, 2021.

On January 17, 2021, Washington announced that there would be no update to their data on January 18, 2021 due to the Martin Luther King Holiday. Because Washington’s data is on a one day lag in our timeseries, we will be unable to update their data on January 19, 2021.

On January 16, 2021, Washington announced that they experienced “technical challenges processing COVID-19 data” and would not be able to update their dashboard. Because Washington’s data is on a one day lag in our timeseries, this affects our data for January 17, 2021.

On January 14, 2021, Washington announced that their hospitalization data was incomplete due to an interruption in their data reporting process. On January 15, 2021, they announced that their hospitalization data was “unusually high” due to a backlog from January 13, 2021 and January 14, 2021. Because their data is on a one day lag in our timeseries, this affects our data for January 15, 2021 and January 16, 2021. To avoid recording incomplete data, we did not update their Ever hospitalized on January 15, 2021 and urge caution when interpreting their hospital data from this time period.

On January 8, 2021, Washington noted that their hospitalization data for the day was incomplete due to a data processing issue, and their Ever hospitalized decreased by 11. Because Washington’s data is on a one day lag in our timeseries, this is reflected in our data for January 9, 2021.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850. Washington noted that "As of December 10, 2020, death counts on our dashboard reflect those in our official vital records database (the Washington Health and Life Events System) where the cause of death was confirmed or suspected to have been COVID-19. If COVID-19 is later ruled out as the official cause of death, we will remove these deaths from our dashboard. We no longer report preliminary death information recorded in other systems."

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

On February 9, 2021, Washington announced that the higher number of deaths was due to a “data processing backlog” from February 8, 2021 being cleared. Because Washington’s data is on a one day lag in our timeseries, this affects our data for February 10, 2021.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, missing negative test results, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On February 3, 2021, Washington reported that the “higher number of new deaths is due to a data processing backlog cleared today from February 2, 2021”. Because Washington’s data is on a one day lag in our timeseries, this will affect our data for February 4, 2021.

On February 2, 2021, Washington reported that its death data would not be updated until February 3, 2021. Since WA is on a one-day lag in our time series, the death counts reported on February 4, 2021 will include two days of data. In addition, possibly because of its ongoing “processing issues” beginning November 21, 2020, Washington’s cumulative death count decreased by two on February 3, 2021.

On January 20, 2021, Washington noted that there would be no update to their deaths due to “processing issues". On January 21, 2021, Washington's data processing backlog was cleared, causing a large increase in Deaths (confirmed and probable). Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021 and January 22, 2021.

On January 20, 2021, Washington noted that their would be no update to their deaths due to “processing issues”. Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021.

On January 20, 2021, Washington noted that the day’s hospitalization data is incomplete and should be interpreted with caution. Because Washington's data is on a one day lag in our timeseries, this will affect the data for January 21, 2021.

On January 17, 2021, Washington announced that there would be no update to their data on January 18, 2021 due to the Martin Luther King Holiday. Because Washington’s data is on a one day lag in our timeseries, we will be unable to update their data on January 19, 2021.

On January 16, 2021, Washington announced that they experienced “technical challenges processing COVID-19 data” and would not be able to update their dashboard. Because Washington’s data is on a one day lag in our timeseries, this affects our data for January 17, 2021.

On January 14, 2021, Washington announced that their hospitalization data was incomplete due to an interruption in their data reporting process. On January 15, 2021, they announced that their hospitalization data was “unusually high” due to a backlog from January 13, 2021 and January 14, 2021. Because their data is on a one day lag in our timeseries, this affects our data for January 15, 2021 and January 16, 2021. To avoid recording incomplete data, we did not update their Ever hospitalized on January 15, 2021 and urge caution when interpreting their hospital data from this time period.

On January 8, 2021, Washington noted that their hospitalization data for the day was incomplete due to a data processing issue, and their Ever hospitalized decreased by 11. Because Washington’s data is on a one day lag in our timeseries, this is reflected in our data for January 9, 2021.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850. Washington noted that "As of December 10, 2020, death counts on our dashboard reflect those in our official vital records database (the Washington Health and Life Events System) where the cause of death was confirmed or suspected to have been COVID-19. If COVID-19 is later ruled out as the official cause of death, we will remove these deaths from our dashboard. We no longer report preliminary death information recorded in other systems."

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, missing negative test results, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On February 3, 2021, Washington reported that the “higher number of new deaths is due to a data processing backlog cleared today from February 2, 2021”. Because Washington’s data is on a one day lag in our timeseries, this will affect our data for February 4, 2021.

On February 2, 2021, Washington reported that its death data would not be updated until February 3, 2021. Since WA is on a one-day lag in our time series, the death counts reported on February 4, 2021 will include two days of data. In addition, possibly because of its ongoing “processing issues” beginning November 21, 2020, Washington’s cumulative death count decreased by two on February 3, 2021.

On January 20, 2021, Washington noted that there would be no update to their deaths due to “processing issues". On January 21, 2021, Washington's data processing backlog was cleared, causing a large increase in Deaths (confirmed and probable). Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021 and January 22, 2021.

On January 20, 2021, Washington noted that their would be no update to their deaths due to “processing issues”. Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021.

On January 20, 2021, Washington noted that the day’s hospitalization data is incomplete and should be interpreted with caution. Because Washington's data is on a one day lag in our timeseries, this will affect the data for January 21, 2021.

On January 17, 2021, Washington announced that there would be no update to their data on January 18, 2021 due to the Martin Luther King Holiday. Because Washington’s data is on a one day lag in our timeseries, we will be unable to update their data on January 19, 2021.

On January 16, 2021, Washington announced that they experienced “technical challenges processing COVID-19 data” and would not be able to update their dashboard. Because Washington’s data is on a one day lag in our timeseries, this affects our data for January 17, 2021.

On January 14, 2021, Washington announced that their hospitalization data was incomplete due to an interruption in their data reporting process. On January 15, 2021, they announced that their hospitalization data was “unusually high” due to a backlog from January 13, 2021 and January 14, 2021. Because their data is on a one day lag in our timeseries, this affects our data for January 15, 2021 and January 16, 2021. To avoid recording incomplete data, we did not update their Ever hospitalized on January 15, 2021 and urge caution when interpreting their hospital data from this time period.

On January 8, 2021, Washington noted that their hospitalization data for the day was incomplete due to a data processing issue, and their Ever hospitalized decreased by 11. Because Washington’s data is on a one day lag in our timeseries, this is reflected in our data for January 9, 2021.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, missing negative test results, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

WA: On February 2, 2021, Washington reported that its death data would not be updated until February 3, 2021. Since WA is on a one-day lag in our time series, the death counts reported on February 4, 2021 will include two days of data. In addition, possibly because of its ongoing “processing issues” beginning November 21, 2020, Washington’s cumulative death count decreased by two on February 3, 2021.

On January 20, 2021, Washington noted that there would be no update to their deaths due to “processing issues". On January 21, 2021, Washington's data processing backlog was cleared, causing a large increase in Deaths (confirmed and probable). Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021 and January 22, 2021.

On January 20, 2021, Washington noted that their would be no update to their deaths due to “processing issues”. Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021.

On January 20, 2021, Washington noted that the day’s hospitalization data is incomplete and should be interpreted with caution. Because Washington's data is on a one day lag in our timeseries, this will affect the data for January 21, 2021.

On January 17, 2021, Washington announced that there would be no update to their data on January 18, 2021 due to the Martin Luther King Holiday. Because Washington’s data is on a one day lag in our timeseries, we will be unable to update their data on January 19, 2021.

On January 16, 2021, Washington announced that they experienced “technical challenges processing COVID-19 data” and would not be able to update their dashboard. Because Washington’s data is on a one day lag in our timeseries, this affects our data for January 17, 2021.

On January 14, 2021, Washington announced that their hospitalization data was incomplete due to an interruption in their data reporting process. On January 15, 2021, they announced that their hospitalization data was “unusually high” due to a backlog from January 13, 2021 and January 14, 2021. Because their data is on a one day lag in our timeseries, this affects our data for January 15, 2021 and January 16, 2021. To avoid recording incomplete data, we did not update their Ever hospitalized on January 15, 2021 and urge caution when interpreting their hospital data from this time period.

On January 8, 2021, Washington noted that their hospitalization data for the day was incomplete due to a data processing issue, and their Ever hospitalized decreased by 11. Because Washington’s data is on a one day lag in our timeseries, this is reflected in our data for January 9, 2021.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, missing negative test results, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On January 20, 2021, Washington noted that there would be no update to their deaths due to “processing issues". On January 21, 2021, Washington's data processing backlog was cleared, causing a large increase in Deaths (confirmed and probable). Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021 and January 22, 2021.

On January 20, 2021, Washington noted that their would be no update to their deaths due to “processing issues”. Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021.

On January 20, 2021, Washington noted that the day’s hospitalization data is incomplete and should be interpreted with caution. Because Washington's data is on a one day lag in our timeseries, this will affect the data for January 21, 2021.

On January 17, 2021, Washington announced that there would be no update to their data on January 18, 2021 due to the Martin Luther King Holiday. Because Washington’s data is on a one day lag in our timeseries, we will be unable to update their data on January 19, 2021.

On January 16, 2021, Washington announced that they experienced “technical challenges processing COVID-19 data” and would not be able to update their dashboard. Because Washington’s data is on a one day lag in our timeseries, this affects our data for January 17, 2021.

On January 14, 2021, Washington announced that their hospitalization data was incomplete due to an interruption in their data reporting process. On January 15, 2021, they announced that their hospitalization data was “unusually high” due to a backlog from January 13, 2021 and January 14, 2021. Because their data is on a one day lag in our timeseries, this affects our data for January 15, 2021 and January 16, 2021. To avoid recording incomplete data, we did not update their Ever hospitalized on January 15, 2021 and urge caution when interpreting their hospital data from this time period.

On January 8, 2021, Washington noted that their hospitalization data for the day was incomplete due to a data processing issue, and their Ever hospitalized decreased by 11. Because Washington’s data is on a one day lag in our timeseries, this is reflected in our data for January 9, 2021.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, missing negative test results, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On January 20, 2021, Washington noted that their would be no update to their deaths due to “processing issues”. Because their data is on a one day lag in our timeseries, this affects our data for January 21, 2021.

On January 20, 2021, Washington noted that the day’s hospitalization data is incomplete and should be interpreted with caution. Because Washington's data is on a one day lag in our timeseries, this will affect the data for January 21, 2021.

On January 17, 2021, Washington announced that there would be no update to their data on January 18, 2021 due to the Martin Luther King Holiday. Because Washington’s data is on a one day lag in our timeseries, we will be unable to update their data on January 19, 2021.

On January 16, 2021, Washington announced that they experienced “technical challenges processing COVID-19 data” and would not be able to update their dashboard. Because Washington’s data is on a one day lag in our timeseries, this affects our data for January 17, 2021.

On January 14, 2021, Washington announced that their hospitalization data was incomplete due to an interruption in their data reporting process. On January 15, 2021, they announced that their hospitalization data was “unusually high” due to a backlog from January 13, 2021 and January 14, 2021. Because their data is on a one day lag in our timeseries, this affects our data for January 15, 2021 and January 16, 2021. To avoid recording incomplete data, we did not update their Ever hospitalized on January 15, 2021 and urge caution when interpreting their hospital data from this time period.

On January 8, 2021, Washington noted that their hospitalization data for the day was incomplete due to a data processing issue, and their Ever hospitalized decreased by 11. Because Washington’s data is on a one day lag in our timeseries, this is reflected in our data for January 9, 2021.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, missing negative test results, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

“On January 20, 2021, Washington noted that the day’s hospitalization data is incomplete and should be interpreted with caution. Because Washington's data is on a one day lag in our timeseries, this will affect the data for January 21, 2021."

On January 17, 2021, Washington announced that there would be no update to their data on January 18, 2021 due to the Martin Luther King Holiday. Because Washington’s data is on a one day lag in our timeseries, we will be unable to update their data on January 19, 2021.

On January 16, 2021, Washington announced that they experienced “technical challenges processing COVID-19 data” and would not be able to update their dashboard. Because Washington’s data is on a one day lag in our timeseries, this affects our data for January 17, 2021.

On January 14, 2021, Washington announced that their hospitalization data was incomplete due to an interruption in their data reporting process. On January 15, 2021, they announced that their hospitalization data was “unusually high” due to a backlog from January 13, 2021 and January 14, 2021. Because their data is on a one day lag in our timeseries, this affects our data for January 15, 2021 and January 16, 2021. To avoid recording incomplete data, we did not update their Ever hospitalized on January 15, 2021 and urge caution when interpreting their hospital data from this time period.

On January 8, 2021, Washington noted that their hospitalization data for the day was incomplete due to a data processing issue, and their Ever hospitalized decreased by 11. Because Washington’s data is on a one day lag in our timeseries, this is reflected in our data for January 9, 2021.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, missing negative test results, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On January 17, 2021, Washington announced that there would be no update to their data on January 18, 2021 due to the Martin Luther King Holiday. Because Washington’s data is on a one day lag in our timeseries, we will be unable to update their data on January 19, 2021.

On January 16, 2021, Washington announced that they experienced “technical challenges processing COVID-19 data” and would not be able to update their dashboard. Because Washington’s data is on a one day lag in our timeseries, this affects our data for January 17, 2021.

On January 14, 2021, Washington announced that their hospitalization data was incomplete due to an interruption in their data reporting process. On January 15, 2021, they announced that their hospitalization data was “unusually high” due to a backlog from January 13, 2021 and January 14, 2021. Because their data is on a one day lag in our timeseries, this affects our data for January 15, 2021 and January 16, 2021. To avoid recording incomplete data, we did not update their Ever hospitalized on January 15, 2021 and urge caution when interpreting their hospital data from this time period.

On January 8, 2021, Washington noted that their hospitalization data for the day was incomplete due to a data processing issue, and their Ever hospitalized decreased by 11. Because Washington’s data is on a one day lag in our timeseries, this is reflected in our data for January 9, 2021.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, missing negative test results, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On January 16, 2021, Washington announced that they experienced “technical challenges processing COVID-19 data” and would not be able to update their dashboard. Because Washington’s data is on a one day lag in our timeseries, this affects our data for January 17, 2021.

On January 14, 2021, Washington announced that their hospitalization data was incomplete due to an interruption in their data reporting process. On January 15, 2021, they announced that their hospitalization data was “unusually high” due to a backlog from January 13, 2021 and January 14, 2021. Because their data is on a one day lag in our timeseries, this affects our data for January 15, 2021 and January 16, 2021. To avoid recording incomplete data, we did not update their Ever hospitalized on January 15, 2021 and urge caution when interpreting their hospital data from this time period.

On January 8, 2021, Washington noted that their hospitalization data for the day was incomplete due to a data processing issue, and their Ever hospitalized decreased by 11. Because Washington’s data is on a one day lag in our timeseries, this is reflected in our data for January 9, 2021.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, missing negative test results, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On January 14, 2021, Washington announced that their hospitalization data was incomplete due to an interruption in their data reporting process. On January 15, 2021, they announced that their hospitalization data was “unusually high” due to a backlog from January 13, 2021 and January 14, 2021. Because their data is on a one day lag in our timeseries, this affects our data for January 15, 2021 and January 16, 2021. To avoid recording incomplete data, we did not update their Ever hospitalized on January 15, 2021 and urge caution when interpreting their hospital data from this time period.

On January 8, 2021, Washington noted that their hospitalization data for the day was incomplete due to a data processing issue, and their Ever hospitalized decreased by 11. Because Washington’s data is on a one day lag in our timeseries, this is reflected in our data for January 9, 2021.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

On January 14, 2021, Washington state announced that their data on hospitalizations was incomplete due to an interruption in their data reporting process. As a result, Cumulative hospitalized was not updated on January 15, 2021; a complete update is expected on January 16, 2021.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, missing negative test results, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On January 8, 2021, Washington noted that their hospitalization data for the day was incomplete due to a data processing issue, and their Ever hospitalized decreased by 11. Because Washington’s data is on a one day lag in our timeseries, this is reflected in our data for January 9, 2021.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, missing negative test results, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On January 8, 2021, Washington noted that their hospitalization data for the day was incomplete due to a data processing issue, and their Ever hospitalized decreased by 11. Because Washington’s data is on a one day lag in our timeseries, this is reflected in our data for January 9, 2021.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On January 8, 2021, Washington noted that their hospitalization data for the day was incomplete due to a data processing issue, and their Ever hospitalized decreased by 11. Because Washington’s data is on a one day lag in our timeseries, this is reflected in our data for January 9, 2021.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On January 4, 2021, Washington's deaths decreased from 3,461 to 3,459 without explanation.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges." Because Washington’s data is on a one day lag in our timeseries, this affects the data for January 3, 2021 and January 4, 2021; they have also provided an update on January 4, 2021, which is atypical of their reporting schedule.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On January 2, 2021, Washington announced that there would be no update to their data dashboard due to “data processing challenges”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for January 3, 2021.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. On January 1, 2020, they noted that there would be no update to their data on January 1, 2021 due to the New Years holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020 and January 2, 2021.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Currently and since November 21, 2020, Washington is reporting a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases, spikes due to backlog processing, and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 29, 2020, Washington announced that their death data included a “backlog of roughly 200 cases that were previously unreported due to a processing issue”. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 30, 2020.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

From November 21, 2020 through today, Washington has reported a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 25, 2020, Washington announced on their COVID-19 dashboard that there would be no update to their data on December 25, 2020 due to the Christmas holiday. Because Washington’s data is on a one day lag in our timeseries, we were unable to update their data on December 26, 2020.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

From November 21, 2020 through today, Washington has reported a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 23, 2020, Washington announced that due to an issue with their hospital reporting process, their hospital data was incomplete. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 24, 2020.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

From November 21, 2020 through today, Washington has reported a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboard that due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

From November 21, 2020 through today, Washington has reported a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboardthat due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

From November 21, 2020 through today, Washington has reported a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. As of December 17, 2020, we are no longer able to report Washington’s Deaths (confirmed). On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington’s dashboard on December 17, 2020. “Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

As of December 20, 2020, Washington no longer updates their data on Sundays. Because Washington’s data is on a one day lag in our timeseries, we are unable to update their data on Mondays.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboardthat due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

From November 21, 2020 through today, Washington has reported a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. On December 17, 2020, we included probable deaths and hospitalizations in our data. On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington's dashboard on December 17, 2020. Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

On December 18, 2020, Washington announced on their COVID-19 Data Dashboardthat due to a change in the way they report COVID-19 deaths, a timing error caused an artificial decrease of 13 Deaths (confirmed + probable) and Deaths (confirmed) on December 18, 2020. Because Washington’s data is on a one day lag in our timeseries due to late updates, this will affect our data for December 19, 2020.

From November 21, 2020 through today, Washington has reported a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On December 19, 2020, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18, 2020, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. On December 17, 2020, we included probable deaths and hospitalizations in our data. On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington's dashboard on December 17, 2020. Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

From November 21, 2020 through today, Washington has reported a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On December 19th, Washington's total test number returned to its normal level, so we updated the December 18th value, replacing the anomalous 2,765,404 with the last value from December 17th (3,432,892), to avoid a huge one day drop in the cumulative test count.

On December 18th, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved."

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. On December 17, 2020, we included probable deaths and hospitalizations in our data. On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington's dashboard on December 17, 2020. Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

From November 21, 2020 through today, Washington has reported a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On December 18th, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved." We are continuing to report the total tests figure from Washington's dashboard and will continue to investigate and adjust this figure if necessary.

On December 16, 2020, Washington added all Probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. On December 17, 2020, we included probable deaths and hospitalizations in our data. On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington's dashboard on December 17, 2020. Since the data is by date of specimen collection, there is missing data for recent days.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

On December 18th, Washington revised down their total test numbers from 3,432,892 to 2,765,404. This might relate to the current note on the dashboard, stating: "Today’s total case counts may include up to 1,000 duplicates. Negative test results data from November 21, 2020 through today are incomplete, as are positive test results from December 16, 2020, thus testing and case numbers should be interpreted with caution. The Epidemiologic Curves tab is the most accurate representation of COVID activity and is updated daily as new cases are identified and duplicates are resolved." We are continuing to report the total tests figure on Washington's dashboard and will continue to investigate and adjust this figure if necessary

On December 16, 2020, Washington added all probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. On December 17, 2020, we included probable deaths and hospitalizations in our data. On December 18, 2020, we backfilled the timeseries of Probable Cases, Confirmed Cases, and Cases (Confirmed and Probable) from data provided on Washington's dashboard on December 17, 2020. Since the data is by date of specimen collection, there is missing data for recent days.

From November 21, 2020 through December 5,2020, Washington experienced a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

On December 16, 2020, Washington added all probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our data, this affects our data for December 17, 2020. On December 17, 2020, we included probable deaths and hospitalizations in our data, but excluded probable cases while we look for a timeseries of this metric.

From November 21, 2020 through today, Washington is experiencing a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures at this moment.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

On December 16, 2020, Washington added all probable cases reported since June, 2020 to their data for December 16, 2020. Because Washington’s data is on a one day lag in our timeseries, this affects our data for December 17, 2020.

From November 21, 2020 through today, Washington is experiencing a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures at this moment.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

From November 21, 2020 through today, Washington is experiencing a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures at this moment.

On December 11, 2020, Washington Deaths decreased from 3016 to 2850 with no explanation.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

From November 21, 2020 through today, Washington is experiencing a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures at this moment.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

From November 21, 2020 through today, Washington is experiencing a variety of technical difficulties and an increased laboratory report volume. As a result, their data through these dates is incomplete and may include duplicate cases and other abnormalities. Please exercise caution when looking at this data and be aware that 7 day averages are a more reliable metric than individual figures at this moment.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from the official Washington Department of Health COVID-19 - risk assessment dashboard. We have also applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results and temporarily removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers were frozen until the state resumed updating them on December 4, 2020. Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

On November 28, 2020, Washington announced that due to high laboratory report volumes, they have not been able to complete their deduplication processes for some cases. As a result, they have reported some duplicate cases in their daily data dashboard update. Please exercise caution when using numbers from November 14, 2020 through November 30, 2020, they may include duplicate cases.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 25, 2020, Washington announced that the Department of Health will not be reporting new negative test results until November 30, 2020. As a result, Washington’s PCR testing data may be affected.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On November 24, 2020, Washington announced via their COVID-19 Data Dashboard that they would be unable to update laboratory testing data on November 24, 2020, and that they “will resume updating all data on 11/30/2020".

On November 23, 2020, Washington announced that the department of health experienced multiple errors to their reporting process and would be unable to update their data dashboard.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

On December 5, 2020, Washington announced that up to 90 of the deaths reported “yesterday” were incorrectly classified and were not due to COVID-19. Because we capture Washington’s data on a one day lag due to late update times, this will affect our data for December 5, 2020.

On December 4, 2020 Washington resumed updating Total PCR tests (test encounters). Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020. As a result, we are again able to update Negative PCR tests (people) which is again a calculated value, from the subtraction of Positive PCR tests (people) from Total PCR tests (test encounters). They further noted that data from November 21, 2020 through December 5, 2020 is incomplete.

On November 25, 2020, Washington began publishing Currently in ICU and Currently hospitalized on the official Washington Department of Health COVID-19 - risk assessment dashboard. As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from this source, and have applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 28, 2020, Washington announced that due to high laboratory report volumes, they have not been able to complete their deduplication processes for some cases. As a result, they have reported some duplicate cases in their daily data dashboard update. Please exercise caution when using numbers from November 14, 2020 through December 5, 2020, as they likely include duplicate cases.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results until November 30, 2020, and then temporally removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers will be frozen until the state returns to updating them.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

On December 4, 2020 Washington resumed updating Total PCR tests (test encounters). Because Washington’s data is on a one day lag in our timeseries, this update will be shown on our data for December 5, 2020. As a result, we are again able to update Negative PCR tests (people) which is again a calculated value, from the subtraction of Positive PCR tests (people) from Total PCR tests (test encounters). However, they further noted that data from November 21, 2020 through December 5, 2020 is incomplete and therefore, percent positive should be interpreted with caution.

On November 25, 2020, Washington began publishing Currently in ICU and Currently hospitalized on the official Washington Department of Health COVID-19 - risk assessment dashboard. As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from this source, and have applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 28, 2020, Washington announced that due to high laboratory report volumes, they have not been able to complete their deduplication processes for some cases. As a result, they have reported some duplicate cases in their daily data dashboard update. Please exercise caution when using numbers from November 14, 2020 through December 5, 2020, as they likely include duplicate cases.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results until November 30, 2020, and then temporally removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers will be frozen until the state returns to updating them.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

On November 25, 2020, WA began publishing Currently in ICU and Currently hospitalized on the official Washington Department of Health COVID-19 - risk assessment dashboard. As of December 4, 2020, we are capturing Washington’s Currently hospitalized and Currently in ICU from this source, and have applied this change retroactively going back to May 13, 2020 for Currently hospitalized, and September 19, 2020 for Currently in ICU.

On November 28, 2020, Washington announced that due to high laboratory report volumes, they have not been able to complete their deduplication processes for some cases. As a result, they have reported some duplicate cases in their daily data dashboard update. Please exercise caution when using numbers from November 14, 2020 through December 4, 2020, as they likely include duplicate cases.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results until November 30, 2020, and then temporally removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers will be frozen until the state returns to updating them.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

On November 28, 2020, Washington announced that due to high laboratory report volumes, they have not been able to complete their deduplication processes for some cases. As a result, they have reported some duplicate cases in their daily data dashboard update. Please exercise caution when using numbers from November 14, 2020 through December 3, 2020, as they likely include duplicate cases.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results until November 30, 2020, and then temporally removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers will be frozen until the state returns to updating them.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

On November 28, 2020, Washington announced that due to high laboratory report volumes, they have not been able to complete their deduplication processes for some cases. As a result, they have reported some duplicate cases in their daily data dashboard update. Please exercise caution when using numbers from November 14, 2020 through December 2, 2020, as they likely include duplicate cases.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results until November 30, 2020, and then temporally removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers will be frozen until the state returns to updating them.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

On November 28, 2020, Washington announced that due to high laboratory report volumes, they have not been able to complete their deduplication processes for some cases. As a result, they have reported some duplicate cases in their daily data dashboard update. Please exercise caution when using numbers from November 14, 2020 through November 30, 2020, they may include duplicate cases.

On November 26, 2020, Washington announced on their COVID-19 Data Dashboard that there would be no update to their data on November 26, 2020. Because Washington’s data is on a one day lag in our time series due to late update times, we will be unable to update Washington’s data on November 27, 2020.

On November 24, 2020, Washington announced that the Department of Health will not be reporting new negative test results until November 30, 2020, and then temporally removed the Total tests (in test encounters) metric from the dashboard. As a result all testing numbers will be frozen until the state returns to updating them.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

On November 25, 2020, Washington announced that the Department of Health will not be reporting new negative test results until November 30, 2020. As a result, Washington’s PCR testing data may be affected.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On November 24, 2020, Washington announced via their COVID-19 Data Dashboard that they would be unable to update laboratory testing data on November 24, 2020, and that they “will resume updating all data on 11/30/2020".

On November 23, 2020, Washington announced that the department of health experienced multiple errors to their reporting process and would be unable to update their data dashboard.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On November 24, 2020, Washington announced via their COVID-19 Data Dashboard that they would be unable to update laboratory testing data on November 24, 2020, and that they “ will resume updating all data on 11/30/2020".

On November 23, 2020, Washington announced that the department of health experienced multiple errors to their reporting process and would be unable to update their data dashboard.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington’s data is on a 1 day lag in our timeseries due to consistently updating after 7:30 pm Eastern Time, when we publish our daily update.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On November 23, 2020, Washington announced that the department of health experienced multiple errors to their reporting process and would be unable to update their data dashboard.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

As of September 18, 2020, Washington's total test results are drawn from our totalTestEncountersViral field instead of calculated via positive+negative.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

We report the most recent hospitalization data available for Washington. In some cases, this data may be reviewed and revised by the Washington State Department of Health. As a result, Washington considers hospitalization data complete after a 18-day lag period. In our data this lag is 20 days.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

On August 26, 2020, Washington switched its total tests units to testing encounters, excluding future encounters from individuals who test positive. It also provided a full timeseries of the figure. This testing encounters figure is slightly different from how we define testing encounters in two ways: first, our definition of testing encounters includes encounters after a positive test, and second, it should be calculated not by summing resulted tests but by counting all daily tests in a separate reporting stream. Despite these differences, the historical and current values of Washington’s figure are still stored in our Total PCR tests (test encounters) field.

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

Between March 31 and April 15, 2020, Washington state did not report Negative PCR tests (people).

On April 18, 2020, Washington state removed 190 confirmed cases that were discovered to be out-of-state residents tested in Washington laboratories.

On June 18, 2020, Washington revised its Total PCR tests (people) downward. On the same date, Washington decreased its count of COVID-19 deaths by 7, because it determined that even though those 7 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On June 22, 2020, we updated previous values for cases and total tests in our time-series using data from Washington state's dashboard. This update caused an artificial decrease in cases and tests between June 21 and June 22.

On July 14, 2020, Washington state revised its count of COVID-19 deaths downward by 39, because it determined that even though those 39 people had tested positive for COVID-19, COVID-19 was not a contributing cause in their deaths.

On August 2, 2020, Washington state Department of Health reported that "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

Washington State reports confirmed cases, laboratory tests, and deaths as of the previous day.

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day.

Washington did not report new negative test results between March 31 and April 15.

On April 18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in Washington labs.

As of April 27, Washington is reporting people tested.

On June 18, due to a previous mistake in reporting negative cases, Washington state revised down the total number of tests. Additionally, Washington state removed seven deaths from its counts where, though the individual who died tested positive, COVID was not a contributing cause in their death.

On June 22, we updated historic numbers of cases and tests from data on Washington's dashboard. This update will temporarily cause an artificial decline in cases and numbers between June 21 and June 22.

On July 11, WA revised its hospitalizations down by 3 from 4665 to 4662.

On July 14, Washington state removed 39 deaths from its counts where, though the individual who died tested positive, COVID was not a contributing cause in their death.

Starting August 2, Washington DOH reported "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day.

Washington did not report new negative test results between March 31 and April 15.

On April 18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in Washington labs.

As of April 27, Washington is reporting people tested.

On June 18, due to a previous mistake in reporting negative cases, Washington state revised down the total number of tests. Additionally, Washington state removed seven deaths from its counts where, though the individual who died tested positive, COVID was not a contributing cause in their death.

On June 22, we updated historic numbers of cases and tests from data on Washington's dashboard. This update will temporarily cause an artificial decline in cases and numbers between June 21 and June 22.

On July 11, WA revised its hospitalizations down by 3 from 4665 to 4662.

On July 14, Washington state removed 39 deaths from its counts where, though the individual who died tested positive, COVID was not a contributing cause in their death.

Starting August 3, Washington DOH reported "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day.

Washington did not report new negative test results between March 31 and April 15.

On April 18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in Washington labs.

As of April 27, Washington is reporting people tested.

On June 18, due to a previous mistake in reporting negative cases, Washington state revised down the total number of tests. Additionally, Washington state removed seven deaths from its counts where, though the individual who died tested positive, COVID was not a contributing cause in their death.

On June 22, we updated historic numbers of cases and tests from data on Washington's dashboard. This update will temporarily cause an artificial decline in cases and numbers between June 21 and June 22.

On July 11, WA revised its hospitalizations down by 3 from 4665 to 4662.

On July 14, Washington state removed 39 deaths from its counts where, though the individual who died tested positive, COVID was not a contributing cause in their death.

On August 3, Washington DOH reported "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but have not reported new negative test results since 8/1."

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day.

Washington did not report new negative test results between March 31 and April 15.

On April 18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in Washington labs.

As of April 27, Washington is reporting people tested.

On June 18, due to a previous mistake in reporting negative cases, Washington state revised down the total number of tests. Additionally, Washington state removed seven deaths from its counts where, though the individual who died tested positive, COVID was not a contributing cause in their death.

On June 22, we updated historic numbers of cases and tests from data on Washington's dashboard. This update will temporarily cause an artificial decline in cases and numbers between June 21 and June 22.

On July 11, WA revised its hospitalizations down by 3 from 4665 to 4662.

On July 14, Washington state removed 39 deaths from its counts where, though the individual who died tested positive, COVID was not a contributing cause in their death.

On August 3, Washington DOH reported "DOH is continuing to experience issues with its reporting system today. We are able to report cases, deaths and hospitalizations but are not reporting negative test results from 8/2."

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day.

Washington did not report new negative test results between March 31 and April 15.

On April 18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in Washington labs.

As of April 27, Washington is reporting people tested.

On June 18, due to a previous mistake in reporting negative cases, Washington state revised down the total number of tests. Additionally, Washington state removed seven deaths from its counts where, though the individual who died tested positive, COVID was not a contributing cause in their death.

On June 22, we updated historic numbers of cases and tests from data on Washington's dashboard. This update will temporarily cause an artificial decline in cases and numbers between June 21 and June 22.

On July 11, WA revised its hospitalizations down by 3 from 4665 to 4662.

On July 14, Washington state removed 39 deaths from its counts where, though the individual who died tested positive, COVID was not a contributing cause in their death.

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day. Washington did not report new negative test results between March 31 and April 15. On April 18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in Washington labs. As of April 27, Washington is reporting people tested. On June 18, due to a previous mistake in reporting negative cases, Washington state revised down the total number of tests. Additionally, Washington state removed seven deaths from its counts where, though the individual who died tested positive, COVID was not a contributing cause in their death. On June 22, we updated historic numbers of cases and tests from data on Washington's dashboard. This update will temporarily cause an artificial decline in cases and numbers between June 21 and June 22. On July 11, WA revised its hospitalizations down by 3 from 4665 to 4662. On July 14, Washington state removed 39 deaths from its counts where, though the individual who died tested positive, COVID was not a contributing cause in their death.

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day. WA did not report new negative test results between March 31 and April 15. On April 18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in WA labs. As of April 27, Washington is reporting people tested. On June 18, due to a previous mistake in reporting negative cases, Washington state revised down the total number of tests. Additionally, Washington state removed seven deaths from its counts where, though the individual who died tested positive, COVID was not a contributing cause in their death. On June 22, we updated historic numbers of cases and tests from data on WA's dashboard. This update will temporarily cause an artificial decline in cases and numbers between June 21 and June 22. On 7/11, WA revised its hospitalizations down by 3 from 4665 to 4662. On July 14, Washington state removed 39 deaths from its counts where, though the individual who died tested positive, COVID was not a contributing cause in their death.

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day. WA did not report new negative test results between March 31 and April 15. On April 18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in WA labs. As of April 27, Washington is reporting people tested. On June 18, due to a previous mistake in reporting negative cases, Washington state revised down the total number of tests. Additionally, Washington state removed seven deaths from its counts where, though the individual who died tested positive, COVID was not a contributing cause in their death. On June 22, we updated historic numbers of cases and tests from data on WA's dashboard. This update will temporarily cause an artificial decline in cases and numbers between June 21 and June 22. On 7/11, WA revised its hospitalizations down by 3 from 4665 to 4662.

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day. WA did not report new negative test results between March 31 and April 15. On April 18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in WA labs. As of April 27, Washington is reporting people tested. On June 18, due to a previous mistake in reporting negative cases, Washington state revised down the total number of tests. Additionally, Washington state removed seven deaths from its counts where, though the individual who died tested positive, COVID was not a contributing cause in their death. On June 22, we updated historic numbers of cases and tests from data on WA's dashboard. This update will temporarily cause an artificial decline in cases and numbers between June 21 and June 22.

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day. WA did not report new negative test results between March 31 and April 15. On April 18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in WA labs. As of April 27, Washington is reporting people tested. On June 18, due to a previous mistake in reporting negative cases, Washington state revised down the total number of tests. Additionally, Washington state removed seven deaths from its counts where, though the individual who died tested positive, COVID was not a contributing cause in their death. On June 22, we updated historic numbers of cases and tests from data on WA's dashboard. This update will temporarily cause an aritifical decline in cases and numbers between June 21 and June 22.

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day. WA did not report new negative test results between March 31 and April 15. On April 18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in WA labs. As of April 27, Washington is reporting people tested. On June 18, due to a previous mistake in reporting negative cases, Washington state revised down the total number of tests. Additionally, Washington state also plans to re-adjust their total death numbers due to a standard adjustment. On June 22, we updated historic numbers of cases and tests from data on WA's dashboard. This update will temporarily cause an aritifical decline in cases and numbers between June 21 and June 22.

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day. WA did not report new negative test results between March 31 and April 15. On April 18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in WA labs. As of April 27, Washington is reporting people tested. On June 18, due to a previous mistake in reporting negative cases, Washington state revised down the total number of tests. Additionally, Washington state also plans to re-adjust their total death numbers due to a standard adjustment. On June 22, we updated historic numbers of cases and tests from data on WA's dashboard. This update will temporarily cause an aritifical decline in cases and numbers between June 21 and June 22.

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day. WA did not report new negative test results between March 31 and April 15. On April 18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in WA labs. As of April 27, Washington is reporting people tested. On June 18, due to a previous mistake in reporting negative cases, Washington state revised down the total number of tests. Additionally, Washington state also plans to re-adjust their total death numbers due to a standard adjustment

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day. WA did not report new negative test results between March 31 and April 15. On April 18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in WA labs. As of April 27, Washington is reporting people tested.

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day. WA did not report new negative test results between March 31 and April 15. On April 18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in WA labs. As of April 27, Washington is reporting people tested.

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day. WA did not report new negative test results between March 31 and April 15. On April 18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in WA labs. As of April 27, Washington is reporting people tested.

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day. WA did not report new negative test results between March 31 and April 15. On April 18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in WA labs. As of April 27, Washington is reporting people tested.

Washington reports confirmed cases, laboratory tests, and deaths as of the previous day. WA did not report new negative test results between 3/31/2020 and 4/15/2020. On 4/18, data cleaning removed 190 confirmed cases that were discovered to be out of state residents tested in WA labs.

WA reports confirmed cases, laboratory tests, and deaths as of the previous day. WA did not report new negative test results between 3/31/2020 and 4/15/2020. 4/19: Total cases reported today (4/19/20) are lower than yesterday. Data cleaning that occurred late on 4/18 removed 190 confirmed cases that were discovered to be out of state residents.

WA reports confirmed cases, laboratory tests, and deaths as of the previous day. WA did not report new negative test results between 3/31/2020 and 4/15/2020.

Since 3/31, Washington reporting has been a little sporadic. WA reports confirmed cases, laboratory tests and deaths as of the previous day. Currently, new negative test results are not reported. The historical data is updated regularly, and CTP data may be updated to match when possible.

Since 3/31, Washington reporting has been a little sporadic.

As of 3/31, Washington is having technical difficulties and reporting is sporadic. Last update was 4/03.

As of 3/31, Washington is having technical difficulties and reporting is sporadic. Washington is tracking cases by date of onset. Data from a new dashboard as of 3/29. Hospitalizations from 3/25 in the Seattle Times.

Washington is as of 3/31 experiencing technical difficulties and reporting will be sporadic until this is resolved. Washington is now tracking cases by date of onset. Data from a new dashboard as of 3/29. Hospitalizations from 3/25 in the Seattle Times.

Washington is now tracking cases by date of onset. Data from a new dashboard as of 3/29. Hospitalizations from 3/25 in the Seattle Times.

Total tests are below the tables with positive cases. Positive includes deaths. As of 3/26, "A small percentage of lab reports (<1%) have yet to be reviewed and are currently counted as negatives*". Hospitalizations from 3/25 in Seattle Times.

Total tests are below the tables with positive cases. Positive includes deaths. Per the state's guidance, the current negatives number is from 3/23, with updates pending.

Total tests are below the tables with positive cases. Positive includes deaths.

Total tests are below the tables with positive cases. Positive includes deaths.

Total tests are below the tables with detail about positive cases. No pending counts. Positive count includes deaths.

Total tests are below the tables with detail about positive cases. No pending counts. Positive count includes deaths.

Total tests are below the tables with detail about positive cases. No pending counts. The positive count includes deaths.

Total tests are reported below the tables with detail about the positive cases. Washington now reports positive and negative, but no pending. We have to subtract deaths from their positive case count, as they lump them in there.