What does it mean if a person’s rapid antigen test result comes back positive after five days of isolation due to Covid-19? According to the experts, that person is most likely still carrying a viral ...

Have you recently taken a COVID-19 test? If you're waiting for your COVID-19 test results, Mayo Clinic COVID-19 diagnostic experts have some helpful guidelines to walk you through the process. It all ...

Antigen tests for COVID-19 can yield false positive results, especially when used improperly, said the US Food and Drug Administration (FDA) in a notification sent to clinical laboratory staff and ...

The potential for IgM cross-reactivity with rheumatoid factor–positive serum samples was observed in blood tests used to detect IgM SARS-CoV-2 by means of gold immunochromatographic and enzyme-linked ...

New findings demonstrate how the rapid antigen test can be used to triage healthcare workers for returning to work during periods of acute staffing shortages during COVID surges. They also show that a ...

At-home rapid COVID-19 tests can reveal more about viral load than a simple positive/negative result, according to experts. "By definition, the basic technology suggests that you somehow have to go ...