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 September 15, 2020, South Carolina started reporting antigen testing data, reporting 7,763 positive tests and 23,477 total tests. Its “viral (i.e. molecular/PCR) tests” positives and totals dropped by about the same amount, likely due to the removal of this data.
Between August 25 and September 21, 2020, South Carolina did not provide updated estimates of the number of Recovered cases.
On September 10, 2020, South Carolina announced that it added a large number of saliva tests from the University of South Carolina to its data, causing an unusually large number of cases in the data for September 11.
On August 23, 2020, South Carolina corrected a double-counting of testing numbers from the months May–August. This resulted in a significant drop of all aspects of testing-related counts, with Total PCR tests (specimens) dropping by approximately 22,000 and total antibody tests dropping by 1,500.
On August 14, 2020, South Carolina reported an unusually large number of tests without explanation.
On July 18, 2020, South Carolina announced it was transitioning to new reporting systems and that "there may be incomplete data with significant gaps." Though reporting resumed July 28, 2020, this resulted in data being carried over at times. We will backfill with the updated numbers when they are available.
As of June 11, 2020, South Carolina reports PCR tests separately from antibody tests. Total test numbers were reduced by around 22,000 as a result of this change.