District of Columbia Overview
When District of Columbia reports no data, several days of data, or unusual data (such as decreases in values that should increase), our volunteers note it here on the date the anomaly occurred. We also note here changes in our own methodology that affect the data.
Negative test results reported in our API and CSVs are calculated by subtracting Total cases from Total PCR tests (specimens) in the absence of better data.
On December 25, 2020, the District of Columbia announced on their COVID-19 page that there would be no update to their data on December 25, 2020 due to the Christmas holiday. Additionally, they noted that the data reported on December 26, 2020 will include numbers from December 24, 2020 and the data reported on December 27, 2020 will include numbers from December 25, 2020 and December 26, 2020.
As of September 18, 2020, District of Columbia's total test results are drawn from our total
TestEncountersViral field instead of calculated via positive+negative.
As of August 29, 2020, we store the “total overall tested” timeseries in our Total Test Encounters (PCR) field despite the following: According to our outreach, the District of Columbia’s “total overall tested” figure on its dashboard represents test encounters, the number of unique individuals tested per day, with one exception: if an individual receives a positive and a negative test on the same day, they are counted twice rather than once.
On May 25, 2020, the District of Columbia decreased the district's total tests number by 11,000 to reflect only DC residents.