We therefore eliminate our estimate of the positive rate. Tweets and press releases generally reported test numbers regarding the number of “proven samples”. However, the wording used in some tweets and press releases makes it clear whether the numbers are related to the number of samples analyzed or the lateral flow test number of people analyzed. For example, the relevant tweet from 4. June 2020 states that “2,640 samples have been analyzed in the last 24 hours”, while the relevant tweet from 1. August 2020 states that “727 people as the last Covid-19 in a sample of 6,371 analyzed in the last 24 hours rate positively”.
At this point, a total of 18 samples were analyzed. Test numbers exclude outstanding test results. The Iranian government gives daily press releases on the cumulative number of tests carried out to date. May 2020, daily situation updates provide test numbers using inconsistent terminology ranging from “tested samples”, “tried people”, “tried suspicious cases” and a similar language. However, we decided to include all of these numbers in our built-in time series because the variation in terminology does not appear to correspond to the main interruptions in the time series.
The numbers given in these press releases are displayed in an official Information Network Security Agency body that we use as our main data source. Fast antigen tests take most diagnostic quick tests into account. These are made with a nose or neck swab and are looking for a protein that is part of the virus. Antigen tests are cheaper and generally have a faster response time, sometimes 15 minutes. However, they are less accurate because the tests can become negative if a person is not close to the maximum infection but is still contagious. CDC advises people who show symptoms of COVID-19 but test positive for an antigen to perform a PCR test to confirm the results.
However, it is currently unclear whether antigen tests are included in the test numbers. According to the CDC, sensitivity to the antigen test varies depending on the time during the infection, but it is believed that it has a “moderate to high” sensitivity during the maximum viral load. Compared to molecular tests, antigen tests tend to produce false negative results, especially if they are carried out in people without symptoms. There is a possibility that your COVID 19 diagnostic test will give a false negative result. This means that the test did not recognize the virus, although it is actually infected with it. You risk unwittingly transferring the virus to others if you don’t take the right precautions, e.g.
They also found that antigen tests are now included in the test numbers. November confirmed that antibody tests are not used to confirm the case or are included in the evidence and case numbers. The Democratic Republic of the Congo publishes daily updates on the epidemiological situation, which state the number of newly analyzed samples (“échantillons testés”). A cumulative sum is not given.