February 6, 2021 to February 7, 2021

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Tags: State Anomalies State Data Note

On February 7, 2021, Delaware noted that due to a technical issue it is reporting 260 cases reported to DPH on February 5 as well as the new cases reported on February 6.

February 5, 2021

Variables affected:

Tags: State Anomalies

On February 5, 2021, Delaware [announced](https://twitter.com/Delaware_DHSS/status/1357838111879921671) via the official Delaware Department of Health and Social Services twitter that 54 of the deaths reported on February 5, 2021 were identified as the result of a data quality review. As a result, the majority of new deaths reported on February 5, 2021 were not identified in the previous 24 hour period.

December 17, 2020 to December 21, 2020

Variables affected:

Tags: State Anomalies State Data Note

Throughout the week of December 17, 2020, Delaware has experienced technical issues with lab reporting. As a result, their case and test data from this period may fluctuate more than normal.

December 17, 2020 to December 18, 2020

Variables affected:

Tags: State Data Note

On December 18th, 2020, Delaware reported that there was a reporting delay on December 17th, 2020 for new cases. This means that the new cases for December 17th is lower than reality and new cases for December 18th is higher than reality

December 7, 2020

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Tags: State Anomalies Other State / Metric No Update State Data Note

On December 7, 2020, Delaware announced that they would no longer be reporting **Recovered **as it was “no longer a true reflection of the number of persons that recovered from the disease” because this metric included only cases who had self-reported their recovery to the Division of Public Health.

March 11, 2020 to October 28, 2020

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Tags: CTP Backfill New Dataset / Timeseries

Backfill Delaware's Total Test Encounters & Positive Tests PCR from files on Delaware's data files.

March 11, 2020 to October 28, 2020

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On October 29, 2020, we moved the data in our **Total Tests (PCR)** field for Delaware to the **Total Test Encounters (PCR)** field after learning that it represents encounters from Delaware's state health department. However, Delaware appears to include antigen tests in its totals, so if an individual is tested using two different test types on the same day, it will get counted twice. Also as of October 29, 2020, Delaware's `totalTestResults` field represents encounters. 200k overall increase in TotalTestResults, 260 day-over-day TotalTestResults increase.

October 13, 2020

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On 10/14, we began to capture the new Total Tests number from DE's dashboard in our Total Tests (PCR) field.

September 27, 2020

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Tags: CTP Backfill CTP Backfill Mistake Correction

We accidentally entered confirmed+probable as confirmed today. We have 20260; it should be 19207

June 11, 2020 to August 11, 2020

Variables affected:

Tags: CTP Backfill New Metric

Delaware started separating confirmed and probable cases on 6/11. CTP did not start capturing probable cases until 7/28. This will backfill the Probable Cases time series by a calculation of Positive - Positive Cases (PCR)

September 15, 2020 to September 18, 2020

Variables affected:

Tags: State Anomalies

On September 18, 2020, Delaware noted that due to a technical issue duplicate records were included in the Confirmed cases reported between September 15 and September 17, 2020. They were removed on September 18, causing an artificial decrease in the number of Confirmed cases reported.

September 10, 2020

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On 9/10, DE included data from 9/8 and 9/9. There were 65 new cases on 9/8 and 94 new cases on 9/9.

September 6, 2020

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On 9/6, the Division of Public Health reported a technical issue which caused between 175-200 positive cases to be excluded from Delaware's cumulative confirmed case count. These cases will be added in the coming days. As a result new cases reported may not have been diagnosed in the past 24 hour period.

August 14, 2020

Variables affected:

Tags: State Anomalies

On August 14, 2020, Delaware included a backlog of 291 Confirmed cases in their data.

August 12, 2020 to August 13, 2020

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Tags: State / Metric No Update

On August 12, 2020 Delaware updated their data after our publish shift, so the data recorded on August 13, 2020 is two days worth of data.

August 30, 2020

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On 8/30, total cases dropped from 17349 to 17343 (-6).

August 27, 2020

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On 8/27, DE decreased 10 units in total cases (16986 -> 16976). Decreased 4 units in confirmed cases (15991 -> 15987). Decreased 6 units in probable cases (995 -> 989).

August 25, 2020

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On 8/25, DE corrected their deaths from 604 to 603 after finding a duplicate. Deaths (confirmed) also dropped by 1, likely reflecting the removal of the duplicate.

August 12, 2020 to August 13, 2020

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States Grades not published for 8/12-8/13

July 25, 2020

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The state of DE revised down total cases, positive cases, total tests.

April 29, 2020 to June 10, 2020

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Tags: CTP API / Logic Changes

Between April 29, 2020 and June 10, 2020, we recorded Delaware's case metric in our **Confirmed Cases** field as well as the **Cases (confirmed plus probable)** field. When they began reporting confirmed and probable cases separately on June 11, 2020, it became clear that Delaware's case total had included probable cases. We removed the **Confirmed Cases** values from our time series on July 18, 2020.

April 10, 2020

Variables affected:

Tags: State Anomalies

On April 10, 2020, Delaware's Negative (people or cases) dropped by 791 with no explanation.