A study led by Osaka University recently found that the sensitivity of rapid antigen tests (RATs) for the Omicron variant of COVID-19 when compared with polymerase chain reaction (PCR) tests was 0.63 ...
There are three different ways to test for COVID-19: PCR tests, antigen tests and antibody tests. Each method is best for a different stage of COVID-19 infection. Used in sequence, all three methods ...