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 ...

Experts share their advice about isolation, masking and more if you're still testing positive for 10 days or more into a COVID-19 infection.

Add Yahoo as a preferred source to see more of our stories on Google. By now, most of us know the basics of taking a COVID-19 test at home. With cases, test positivity and hospitalizations due to ...

A Facebook user claimed that Minute Maid Peach Punch tested positive for COVID-19 on a rapid test. The test appeared to display positive results, but that doesn’t mean the test detected the virus.

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 ...

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 ...

Some 50% of people who test positive for Covid-19 on a rapid test after five days of infection are likely no longer contagious, a Journal of the American Medical Association study released on ...

As COVID-19 variant EG.5, nicknamed “Eris,” continues to spread across the U.S., it’s important to be prepared ahead of a possible infection by stocking up on the best at-home COVID tests. So once ...