Results from a single-center randomized controlled trial published yesterday in JAMA Internal Medicine show that azelastine, ...

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 ...

Researchers investigated how antigen concentration and viral load in different specimen types affected the performance of SARS-CoV-2 rapid diagnostic tests (RDTs).

The best time to take an at-home COVID-19 test may be on the fourth day of having symptoms, according to a new study.