California

On February 25, 2021, California announced that their deaths included a backlog of 806 deaths initially not reported as COVID-19 deaths from Los Angeles County. As a result, many of the deaths reported on February 25, 2021 occurred between December 3, 2020 and February 3, 2021. We urge caution when interpreting numbers from this period, and encourage the use of 7 and 14-day averages as more reliable metrics than individual figures.

On December 16, 2020, California announced that their cases for December 16, 2020 include 15,337 cases from previous days due to a change in case processing. It appears this new process will regularly include a higher volume of cases that were not identified within the previous 24 hours.

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

From July 23 through July 28, 2020, California reported that its Now hospitalized and Now in ICU were incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for this period if the complete data becomes available.

From June 29 to July 5, 2020, California made revisions to daily case numbers. On July 17, we updated the values based on the most recent data from the state dashboard.

On July 8, 2020, California data included a backlog from Los Angeles County, which had not reported for several days. Approximately 1,000 of the 11,000 new cases were attributed to this backlog data.

As of April 22, 2020, California has reported specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

On April 4 and April 22, 2020, California reported large batches of backlogged negative test data.

Prior to April 1, 2020, we used county data sources for more reliably timely reporting of California's COVID-19 data. At the start of April, we began reporting primarily from the state data dashboard(s). This led to a modest drop in cases and deaths, as the state's data lags behind the county sources.

On December 16, 2020, California announced that their cases for December 16, 2020 include 15,337 cases from previous days due to a change in case processing. It appears this new process will regularly include a higher volume of cases that were not identified within the previous 24 hours.

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

From July 23 through July 28, 2020, California reported that its Now hospitalized and Now in ICU were incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for this period if the complete data becomes available.

From June 29 to July 5, 2020, California made revisions to daily case numbers. On July 17, we updated the values based on the most recent data from the state dashboard.

On July 8, 2020, California data included a backlog from Los Angeles County, which had not reported for several days. Approximately 1,000 of the 11,000 new cases were attributed to this backlog data.

As of April 22, 2020, California has reported specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

On April 4 and April 22, 2020, California reported large batches of backlogged negative test data.

Prior to April 1, 2020, we used county data sources for more reliably timely reporting of California's COVID-19 data. At the start of April, we began reporting primarily from the state data dashboard(s). This led to a modest drop in cases and deaths, as the state's data lags behind the county sources.

Negative test results reported in our API and CSVs are calculated by subtracting Confirmed cases from Total PCR tests (specimens) in the absence of better data.

On December 16, 2020, California announced that their cases for December 16, 2020 include 15,337 cases from previous days due to a change in case processing. It appears this new process will regularly include a higher volume of cases that were not identified within the previous 24 hours.

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

From July 23 through July 28, 2020, California reported that its Now hospitalized and Now in ICU were incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for this period if the complete data becomes available.

From June 29 to July 5, 2020, California made revisions to daily case numbers. On July 17, we updated the values based on the most recent data from the state dashboard.

On July 8, 2020, California data included a backlog from Los Angeles County, which had not reported for several days. Approximately 1,000 of the 11,000 new cases were attributed to this backlog data.

As of April 22, 2020, California has reported specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

On April 4 and April 22, 2020, California reported large batches of backlogged negative test data.

Prior to April 1, 2020, we used county data sources for more reliably timely reporting of California's COVID-19 data. At the start of April, we began reporting primarily from the state data dashboard(s). This led to a modest drop in cases and deaths, as the state's data lags behind the county sources.

Negative test results reported in our API and CSVs are calculated by subtracting Confirmed cases from Total PCR tests (specimens) in the absence of better data.

On December 25, 2020, California did not update their hospitalization dashboard. As a result, we were unable to update their Currently hospitalized and Currently in ICU on December 25, 2020.

On December 16, 2020, California announced that their cases for December 16, 2020 include 15,337 cases from previous days due to a change in case processing. It appears this new process will regularly include a higher volume of cases that were not identified within the previous 24 hours.

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

From July 23 through July 28, 2020, California reported that its Now hospitalized and Now in ICU were incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for this period if the complete data becomes available.

From June 29 to July 5, 2020, California made revisions to daily case numbers. On July 17, we updated the values based on the most recent data from the state dashboard.

On July 8, 2020, California data included a backlog from Los Angeles County, which had not reported for several days. Approximately 1,000 of the 11,000 new cases were attributed to this backlog data.

As of April 22, 2020, California has reported specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

On April 4 and April 22, 2020, California reported large batches of backlogged negative test data.

Prior to April 1, 2020, we used county data sources for more reliably timely reporting of California's COVID-19 data. At the start of April, we began reporting primarily from the state data dashboard(s). This led to a modest drop in cases and deaths, as the state's data lags behind the county sources.

Negative test results reported in our API and CSVs are calculated by subtracting Confirmed cases from Total PCR tests (specimens) in the absence of better data.

On December 25, 2020, California announced that it did not update its dashboard due to the holiday. Data reported on December 26, 2020 will include data from both December 25 and December 26.

On December 16, 2020, California announced that their cases for December 16, 2020 include 15,337 cases from previous days due to a change in case processing. It appears this new process will regularly include a higher volume of cases that were not identified within the previous 24 hours.

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

From July 23 through July 28, 2020, California reported that its Now hospitalized and Now in ICU were incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for this period if the complete data becomes available.

From June 29 to July 5, 2020, California made revisions to daily case numbers. On July 17, we updated the values based on the most recent data from the state dashboard.

On July 8, 2020, California data included a backlog from Los Angeles County, which had not reported for several days. Approximately 1,000 of the 11,000 new cases were attributed to this backlog data.

As of April 22, 2020, California has reported specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

On April 4 and April 22, 2020, California reported large batches of backlogged negative test data.

Prior to April 1, 2020, we used county data sources for more reliably timely reporting of California's COVID-19 data. At the start of April, we began reporting primarily from the state data dashboard(s). This led to a modest drop in cases and deaths, as the state's data lags behind the county sources.

Negative test results reported in our API and CSVs are calculated by subtracting Positive PCR tests (people) from Total PCR tests (specimens) in the absence of better data.

On December 16, 2020, California announced that their cases for December 16, 2020 include 15,337 cases from previous days due to a change in case processing. It appears this new process will regularly . As a result, not all new cases reported on December 16, 2020 were identified within the previous 24 hour period.

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

From July 23 through July 28, 2020, California reported that its Now hospitalized and Now in ICU were incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for this period if the complete data becomes available.

From June 29 to July 5, 2020, California made revisions to daily case numbers. On July 17, we updated the values based on the most recent data from the state dashboard.

On July 8, 2020, California data included a backlog from Los Angeles County, which had not reported for several days. Approximately 1,000 of the 11,000 new cases were attributed to this backlog data.

As of April 22, 2020, California has reported specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

On April 4 and April 22, 2020, California reported large batches of backlogged negative test data.

Prior to April 1, 2020, we used county data sources for more reliably timely reporting of California's COVID-19 data. At the start of April, we began reporting primarily from the state data dashboard(s). This led to a modest drop in cases and deaths, as the state's data lags behind the county sources.

Negative test results reported in our API and CSVs are calculated by subtracting Positive PCR tests (people) from Total PCR tests (specimens) in the absence of better data.

On December 16, 2020, California announced that their cases for December 16, 2020 include 15337 cases from previous days. As a result, not all new cases reported on December 16, 2020 were identified within the previous 24 hour period.

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

From July 23 through July 28, 2020, California reported that its Now hospitalized and Now in ICU were incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for this period if the complete data becomes available.

From June 29 to July 5, 2020, California made revisions to daily case numbers. On July 17, we updated the values based on the most recent data from the state dashboard.

On July 8, 2020, California data included a backlog from Los Angeles County, which had not reported for several days. Approximately 1,000 of the 11,000 new cases were attributed to this backlog data.

As of April 22, 2020, California has reported specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

On April 4 and April 22, 2020, California reported large batches of backlogged negative test data.

Prior to April 1, 2020, we used county data sources for more reliably timely reporting of California's COVID-19 data. At the start of April, we began reporting primarily from the state data dashboard(s). This led to a modest drop in cases and deaths, as the state's data lags behind the county sources.

Negative test results reported in our API and CSVs are calculated by subtracting Positive PCR tests (people) from Total PCR tests (specimens) in the absence of better data.

On December 16, 2020, California [announced(https://www.cdph.ca.gov/Programs/OPA/Pages/NR20-338.aspx) that their cases for December 16, 2020 include 15337 cases from previous days. As a result, not all new cases reported on December 16, 2020 were identified within the previous 24 hour period.

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

From July 23 through July 28, 2020, California reported that its Now hospitalized and Now in ICU were incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for this period if the complete data becomes available.

From June 29 to July 5, 2020, California made revisions to daily case numbers. On July 17, we updated the values based on the most recent data from the state dashboard.

On July 8, 2020, California data included a backlog from Los Angeles County, which had not reported for several days. Approximately 1,000 of the 11,000 new cases were attributed to this backlog data.

As of April 22, 2020, California has reported specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

On April 4 and April 22, 2020, California reported large batches of backlogged negative test data.

Prior to April 1, 2020, we used county data sources for more reliably timely reporting of California's COVID-19 data. At the start of April, we began reporting primarily from the state data dashboard(s). This led to a modest drop in cases and deaths, as the state's data lags behind the county sources.

Negative test results reported in our API and CSVs are calculated by subtracting Positive PCR tests (people) from Total PCR tests (specimens) in the absence of better data.

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

From July 23 through July 28, 2020, California reported that its Now hospitalized and Now in ICU were incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for this period if the complete data becomes available.

From June 29 to July 5, 2020, California made revisions to daily case numbers. On July 17, we updated the values based on the most recent data from the state dashboard.

On July 8, 2020, California data included a backlog from Los Angeles County, which had not reported for several days. Approximately 1,000 of the 11,000 new cases were attributed to this backlog data.

As of April 22, 2020, California has reported specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

On April 4 and April 22, 2020, California reported large batches of backlogged negative test data.

Prior to April 1, 2020, we used county data sources for more reliably timely reporting of California's COVID-19 data. At the start of April, we began reporting primarily from the state data dashboard(s). This led to a modest drop in cases and deaths, as the state's data lags behind the county sources.

Negative test results reported in our API and CSVs are calculated by subtracting Positive PCR tests (people) from Total PCR tests (specimens) in the absence of better data.

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

From July 23 through July 28, 2020, California reported that its Now hospitalized and Now in ICU were incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for this period if the complete data becomes available.

From June 29 to July 5, 2020, California made revisions to daily case numbers. On July 17, we updated the values based on the most recent data from the state dashboard.

On July 8, 2020, California data included a backlog from Los Angeles County, which had not reported for several days. Approximately 1,000 of the 11,000 new cases were attributed to this backlog data.

As of April 22, 2020, California has reported specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

On April 4 and April 22, 2020, California reported large batches of backlogged negative test data.

Prior to April 1, 2020, we used county data sources for more reliably timely reporting of California's COVID-19 data. At the start of April, we began reporting primarily from the state data dashboard(s). This led to a modest drop in cases and deaths, as the state's data lags behind the county sources.

Prior to April 1, 2020, we used county data sources for more reliably timely reporting of California's COVID-19 data. At the start of April, we began reporting primarily from the state data dashboard(s). This led to a modest drop in cases and deaths, as the state's data lags behind the county sources.

On April 4 and April 22, 2020, California reported large batches of backlogged negative test data.

As of April 22, 2020, California has reported specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

On July 8, 2020, California data included a backlog from Los Angeles County, which had not reported for several days. Approximately 1,000 of the 11,000 new cases were attributed to this backlog data.

From June 29 to July 5, 2020, California made revisions to daily case numbers. On July 17, we updated the values based on the most recent data from the state dashboard.

From July 23 through July 28, 2020, California reported that its Now hospitalized and Now in ICU were incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for this period if the complete data becomes available.

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

Negative test results reported in our API and CSVs are calculated by subtracting Positive PCR tests (people) from Total PCR tests (specimens) in the absence of better data.

Prior to April 1, 2020, we used county data sources for more reliably timely reporting of California's COVID-19 data. At the start of April, we began reporting primarily from the state data dashboard(s). This led to a modest drop in cases and deaths, as the state's data lags behind the county sources.

On April 4 and April 22, 2020, California reported large batches of backlogged negative test data.

As of April 22, 2020, California has reported specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

On July 8, 2020, California data included a backlog from Los Angeles County, which had not reported for several days. Approximately 1,000 of the 11,000 new cases were attributed to this backlog data.

From June 29 to July 5, 2020, California made revisions to daily case numbers. On July 17, we updated the values based on the most recent data from the state dashboard.

From July 23 through July 28, 2020, California reported that its Now hospitalized and Now in ICU were incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for this period if the complete data becomes available.

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

Negative test results reported in our API and CSVs are calculated by subtracting Positive PCR tests (people) from Total PCR tests (specimens) in the absence of better data.

Prior to April 1, 2020, we used county data sources for more reliably timely reporting of California's COVID-19 data. At the start of April, we began reporting primarily from the state data dashboard(s). This led to a modest drop in cases and deaths, as the state's data lags behind the county sources.

On April 4 and April 22, 2020, California reported large batches of backlogged negative test data.

As of April 22, 2020, California has reported specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

On July 8, 2020, California data included a backlog from Los Angeles County, which had not reported for several days. Approximately 1,000 of the 11,000 new cases were attributed to this backlog data.

From June 29 to July 5, 2020, California made revisions to daily case numbers. On July 17, we updated the values based on the most recent data from the state dashboard.

From July 23 through July 28, 2020, California reported that its Now hospitalized and Now in ICU were incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for this period if the complete data becomes available.

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

Negative test results reported in our API and CSVs are calculated by subtracting Positive PCR tests (people) from Total PCR tests (specimens) in the absence of better data.

Prior to April 1, 2020, we used county data sources for more reliably timely reporting of California's COVID-19 data. At the start of April, we began reporting primarily from the state data dashboard(s). This led to a modest drop in cases and deaths, as the state's data lags behind the county sources.

On April 4 and April 22, 2020, California reported large batches of backlogged negative test data.

As of April 22, 2020, California has reported specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

On July 8, 2020, California data included a backlog from Los Angeles County, which had not reported for several days. Approximately 1,000 of the 11,000 new cases were attributed to this backlog data.

From June 29 to July 5, 2020, California made revisions to daily case numbers. On July 17, we updated the values based on the most recent data from the state dashboard.

From July 23 through July 28, 2020, California reported that its Now hospitalized and Now in ICU were incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for this period if the complete data becomes available.

Negative test results reported in our API and CSVs are calculated by subtracting Positive PCR tests (people) from Total PCR tests (specimens) in the absence of better data.

Prior to April 1, 2020, we used county data sources for more reliably timely reporting of California's COVID-19 data. At the start of April, we began reporting primarily from the state data dashboard(s). This led to a modest drop in cases and deaths, as the state's data lags behind the county sources.

On April 4 and April 22, 2020, California reported large batches of backlogged negative test data.

As of April 22, 2020, California has reported specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

On July 8, 2020, California data included a backlog from Los Angeles County, which had not reported for several days. Approximately 1,000 of the 11,000 new cases were attributed to this backlog data.

From June 29 to July 5, 2020, California made revisions to daily case numbers. On July 17, we updated the values based on the most recent data from the state dashboard.

From July 23 through July 28, 2020, California reported that its Now hospitalized and Now in ICU were incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for this period if the complete data becomes available.

Negative test results reported in our API and CSVs are calculated by subtracting Positive PCR tests (people) from Total PCR tests (specimens) in the absence of better data.

Prior to April 1, 2020, we used county data sources for more reliably timely reporting of California's COVID-19 data. At the start of April, we began reporting primarily from the state data dashboard(s). This led to a modest drop in cases and deaths, as the state's data lags behind the county sources.

On April 4 and April 22, 2020, California reported large batches of backlogged negative test data.

As of April 22, 2020, California has reported specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

On July 8, 2020, California data included a backlog from Los Angeles County, which had not reported for several days. Approximately 1,000 of the 11,000 new cases were attributed to this backlog data.

From June 29 to July 5, 2020, California made revisions to daily case numbers. On July 17, we updated the values based on the most recent data from the state dashboard.

From July 23 through July 28, 2020, California reported that its Now hospitalized and Now in ICU were incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for this period if the complete data becomes available.

Negative test results reported in our API and CSVs are calculated by subtracting Positive PCR tests (people) from Total PCR tests (specimens) in the absence of better data.

Before April 1, California was inconsistent in the timing of reporting so we used faster-updating county sources, we then standardized on the state data dashboard(s). This led to a drop in cases and deaths, as the state's data lags county sources.

The state reported a huge batch of negative tests on April 4 and again on April 22.

As of April 22, California now reports specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

On July 8, California data included a backlog of data from Los Angeles County, which had not reported for several days. About 1000 of the 11,000 new cases are due to this spike in reporting.

From June 29 to July 5, California made a few revisions to daily case numbers, on July 17 we updated the values based on the most recent data from their dashboard.

Starting July 23, California has reported that its current hospitalization and ICU numbers are incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for July 23 - July 28 when reporting is back at 100%

Before April 1, California was inconsistent in the timing of reporting so we used faster-updating county sources, we then standardized on the state data dashboard(s). This led to a drop in cases and deaths, as the state's data lags county sources. The state reported a huge batch of negative tests on April 4 and again on April 22. As of April 22, California now reports specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested. On July 8, California data included a backlog of data from Los Angeles County, which had not reported for several days. About 1000 of the 11,000 new cases are due to this spike in reporting. From June 29 to July 5, California made a few revisions to daily case numbers, on July 17 we updated the values based on the most recent data from their dashboard. Starting July 23, California has reported that its current hospitalization and ICU numbers are incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for July 23 - July 28 when reporting is back at 100%

Before April 1, California was inconsistent in the timing of reporting so we used faster-updating county sources, we then standardized on the state data dashboard(s). This led to a drop in cases and deaths, as the state's data lags county sources. The state reported a huge batch of negative tests on April 4 and again on April 22. As of April 22, California now reports specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested. On July 8, California data included a backlog of data from Los Angeles County, which had not reported for several days. About 1000 of the 11,000 new cases are due to this spike in reporting. From June 29 to July 5, California made a few revisions to daily case numbers, on July 17 we updated the values based on the most recent data from their dashboard. Since July 23, California has reported that its current hospitalization and ICU numbers are incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for July 23 - July 28 when reporting is back at 100%

Before April 1, CA was inconsistent in the timing of reporting so we used faster-updating sources, we then standardized on the state data dashboard(s). This led to a drop in cases and deaths, as the state's data lags county sources. The state reported a huge batch of negative tests on April 4 and again on April 22. As of April 22, California now reports specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested. On July 8, CA data included a backlog of data from Los Angeles County, which had not reported for several days. About 1000 of the 11,000 new cases are due to this spike in reporting. From June 29 to July 5th, California made a few revisions to daily case numbers, on 7/17 we updated the values based on the most recent data from their dashboard. Since July 23, California has reported that its current hospitalization and ICU numbers are incomplete due to its transition to the HHS reporting system. We carried over hospitalization figures until July 28. We will backfill the complete numbers for 7/23-7/28 when reporting is back at 100%

Before April 1, CA was inconsistent in the timing of reporting so we used faster-updating sources, we then standardized on the state data dashboard(s). This led to a drop in cases and deaths, as the state's data lags county sources. The state reported a huge batch of negative tests on April 4 and again on April 22. As of April 22, California now reports specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested. On July 8, CA data included a backlog of data from Los Angeles County, which had not reported for several days. About 1000 of the 11,000 new cases are due to this spike in reporting. From June 29 to July 5th, California made a few revisions to daily case numbers, on 7/17 we updated the values based on the most recent data from their dashboard. On July 23, California reported that there will be incomplete current hospitalization numbers due to its transition to the HHS reporting system. We are carrying over yesterday's data points to maintain a consistent time-series and will backfill with the updated numbers once available.

Before April 1, CA was inconsistent in the timing of reporting so we used faster-updating sources, we then standardized on the state data dashboard(s). This led to a drop in cases and deaths, as the state's data lags county sources. The state reported a huge batch of negative tests on April 4 and again on April 22. As of April 22, California now reports specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested. On July 8, CA data included a backlog of data from Los Angeles County, which had not reported for several days. About 1000 of the 11,000 new cases are due to this spike in reporting. From June 29 to July 5th, California made a few revisions to daily case numbers, on 7/17 we updated the values based on the most recent data from their dashboard. On July 23, California reported that there will be incomplete current hospitalization numbers due to its transition to the HHS reporting system. We are carrying over yesterday's data points to maintain a consistent time-series and will backfill with the updated numbers once available.

Before April 1, CA was inconsistent in the timing of reporting so we used faster-updating sources, we then standardized on the state data dashboard(s). This led to a drop in cases and deaths, as the state's data lags county sources. The state reported a huge batch of negative tests on April 4 and again on April 22. As of April 22, California now reports specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested. On July 8, CA data included a backlog of data from Los Angeles County, which had not reported for several days. About 1000 of the 11,000 new cases are due to this spike in reporting. From June 29 to July 5th, California made a few revisions to daily case numbers, on 7/17 we updated the values based on the most recent data from their dashboard.

Before April 1 CA was inconsistent in the timing of reporting so we used faster-updating sources, we then standardized on the state data dashboard(s). This led to a drop in cases and deaths, as the state's data lags county sources. The state reported a huge batch of negative tests on April 4 and again on April 22. As of April 22, California now reports specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested. On July 8, CA data included a backlog of data from Los Angeles County, which had not reported for several days. About 1000 of the 11,000 new cases are due to this spike in reporting. From June 29 to July 5th, California made a few revisions to daily case numbers, on 7/17 we updated the values based on the most recent data from their dashboard.

Before April 1 CA was inconsistent in the timing of reporting so we used faster-updating sources, we then standardized on the state data dashboard(s). This led to a drop in cases and deaths, as the state's data lags county sources. The state reported a huge batch of negative tests on April 4 and again on April 22. As of April 22, California now reports specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested. On July 8, CA data included a backlog of data from Los Angeles County, which had not reported for several days. About 1000 of the 11,000 new cases are due to this spike in reporting.

Before April 1 CA was inconsistent in the timing of reporting so we used faster-updating sources, we then standardized on the state data dashboard(s). This led to a drop in cases and deaths, as the state's data lags county sources. The state reported a huge batch of negative tests on April 4 and again on April 22. As of April 22, California now reports specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

California has been inconsistent in its timing of reporting. We used faster-updating sources until 4/1, when we standardized on its new data dashboards. This led to a drop in cases and deaths, as the state's data lags county sources. The state reported a huge batch of negative tests on April 4 and again on April 22. As of April 22, California now reports specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

California has been inconsistent in its timing of reporting. We used faster-updating sources until 4/1, when we standardized on its new data dashboards. This led to a drop in cases and deaths, as the state's data lags county sources. The state reported a huge batch of negative tests on April 4 and again on April 22. As of April 22, California now reports specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

California has been inconsistent in its timing of reporting. We used faster-updating sources until 4/1, when we standardized on its new data dashboards. This led to a drop in cases and deaths, as the state's data lags county sources. The state reported a huge batch of negative tests on April 4 and again on April 22. As of April 22, California now reports specimens tested instead of people tested. Because some people may be tested more than once, this number is probably higher than the number of people tested.

California has been inconsistent in its timing of reporting. We used faster-updating sources until 4/1, when we standardized on its new data dashboards. This led to a drop in cases and deaths, as the state's data lags county sources. The state reported a huge batch of negative tests on 4/4 and again on 4/22. As of 4/22, California now reports specimens tested instead of people tested.

California has been inconsistent in its timing of reporting. We used faster-updating sources until 4/1, when we standardized on its new data dashboards. This led to a drop in cases and deaths, as the state's data lags county sources. The state reported a huge batch of negative tests on April 4 and again on April 22. As of April 22, California now reports specimens tested instead of people tested.

California has been inconsistent in its timing of reporting. We used faster-updating sources until 4/1, when we standardized on its new data dashboards. This led to a drop in cases and deaths, as the state's data lags county sources. We assume "tests conducted" = "people tested." The state reported a huge batch of negative tests on 4/4. Negative, pending, and total counts tend to lag positive counts by one day.

The state has been inconsistent in its timing of reporting, so we used faster updating sources until 4/1, when we standardized on California's new data dashboards. This led to a drop in cases and deaths, as the state's data lags some other sources. We assume that "tests conducted" = "people tested." The state also reported a huge batch of negative tests 4/4. Negative, pending, and total test reporting tend to lag positive test reporting by one day.

The state has been inconsistent in its timing of reporting, so we used faster updating sources until 4/1, when we standardized on California's new data dashboards. This led to a drop in cases and deaths, as the state's data lags some other sources. We assume that "tests conducted" = "people tested." The state also reported a huge batch of negative tests 4/4. Then did not update negatives 4/6.

California has shown a huge number of pending tests. The state has been inconsistent in its timing of reporting, so we used faster updating sources until 4/1, when we standardized on California's new data dashboards. This led to a drop in cases and deaths, as the state's data lags some other sources. We assume that "tests conducted" = "people tested." Negatives and pending from California state 3/31 update. Hospitalization data from 4/1 Newsom press conference.

California continues to show a huge number of pending tests. It fell on 3/30 because CA reported an error by one of the private labs. The state has been inconsistent in its timing of reporting, so we are now using the Sonoma County dashboard for case counts and deaths, and state numbers for negatives and other outcome data. We assume that "tests conducted" = "people tested."

California continues to show a huge number of pending tests. We add the death count back into the positive results number, because California has been excluding them from their positive count. The state has been inconsistent in its timing of reporting, so we are now using the Sonoma County dashboard for case counts and deaths, and state numbers for negatives and other outcome data. We assume that "tests conducted" = "people tested."

On 3/27, we know CA lists 88,400 total tests, but they have not split them out between negatives and pending. So we've added new positive and death numbers, but not new negatives or pending. We'll update as soon as the state releases complete numbers. Since CA is now issuing press releases every day on a consistent schedule, we will only be updating numbers based on official CA-reported numbers. We add the death count back into the positive results number, because California has been excluding them from their positive count. We assume that "tests conducted" = "people tested."

Since CA is now issuing press releases every day on a consistent schedule, we will only be updating numbers based on official CA-reported numbers. We add the death count back into the positive results number, because California has been excluding them from their positive count. We assume that "tests conducted" = "people tested."

Since CA is now issuing press releases every day on a consistent schedule, we will only be updating numbers based on official CA-reported numbers. We add the death count back into the positive results number, because California has been excluding them from their positive count. We assume that "tests conducted" = "people tested."

Since CA is now issuing press releases every day on a consistent schedule, we will only be updating numbers based on official CA-reported numbers. We add the death count back into the positive results number, because California has been excluding them from their positive count. We assume that "tests conducted" = "people tested."

We report positives from the LA Times, which is aggregated from county-level data and is ahead of the official California data site. When using LA Times data for positives, we do not add deaths to the positive count: they are already included. Previously we added them in because the California state site had not been including them in the positive count. Negative numbers are inferred from Totals - Positives, taken from the latest press release. We are not reporting pending numbers until they are reported regularly, or from a dashboard. We assume 1 test=1 person.

We report positives from the LA Times, which is aggregated from county-level data and is ahead of the official California data site. When using LA Times data for positives, we do not add deaths to the positive count: they are already included. Previously we added them in because the California state site had not been including them in the positive count. Negative numbers are inferred from Totals - Positives, taken from the latest press release. We are not reporting pending numbers until they are reported regularly, or from a dashboard. We assume 1 test=1 person.

We report positives from the LA Times, which is aggregated from county-level data and is ahead of the official California data site. When using LA Times data for positives, we do not add deaths back into the positive count, as they are already included. Previously, we were adding them back in because the California state site was not including them in the positive count. Negative numbers are inferred from Totals - Positives, taken from the latest press release. We ignoring pending numbers when they are irregularly reported from a press conference/non-dashboard source. We're assuming 1 test=1 person, pending further guidance.

We report positives from the LA Times, which is aggregated from county-level data and is ahead of the official California data site. When using LA Times data for positives, we do not add deaths back into the positive count, as we are assuming they are already included. Previously, we were adding them back in because the California state site was not including them in the positive count. Negative numbers are inferred from Totals - Positives, taken from the latest press release. We ignoring pending numbers when they are irregularly reported from a press conference/non-dashboard source. We're assuming 1 test=1 person, pending further guidance.

Only positives reported regularly. Add deaths to the positive count. Last negative inferred from 3/18 Newsom press conference. In addition, we will be ignoring irregularly reported pending numbers when they come from a non-dashboard source.

Only positives reported regularly. Add deaths to the positive count. Last negative (7981) from 3/15 San Jose Mercury News. Unclear if the total is "total tests" or "total people tested." For now we assume it's "total people tested."

Only positives reported regularly. Add deaths to the positive count. Last negative (7981) from 3/15 San Jose Mercury News. Unclear if the total is "total tests" or "total people tested." For now we assume it's "total people tested."

Only positives reported regularly. Add deaths to the positive count. Last negative (7924) from 3/15 San Jose Mercury News. Unclear if the total is "total tests" or "total people tested." For now we assume it's "total people tested."

Only positive counts reported regularly. Last negative (7965) from 3/15 San Jose Mercury News. There is some uncertainty about whether California is now reporting "total tests" or "total people tested." Pending clarification, we are counting their number as "total people tested." We add deaths to the positive count.

Only positive counts reported regularly. Last negative (916) from 3/10.
Deaths reported alongside “positive cases”. We add deaths to the positive count. New positive is from a separate press release; data on site is stale as of 3/15.

Only positive counts reported regularly. We have a negative count of 916, as of 3/10.
Deaths reported alongside “positive cases”. We add deaths to the positive count.

The state website only reports positives, but we have confirmation from the state that there were 916 people who tested negative, as of 3/10. When the state updates the positive number, our numbers fall of out alignment. This number is necessarily inaccurate, but less inaccurate than a 0 in that cell. So, enter 916.

Also, California has started reporting deaths alongside “positive cases”. Deaths are not included in California's positive number. We include them in a separate column.