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 ...

A COVID-19 antigen test with results that can be read directly from a test card received an emergency use authorization on 26 August, the US Food and Drug Administration (FDA) announced. The ...

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.

A leading pharmacist has warned people who test positive for Covid to stay at home for at least five days to stem the spread of two highly-infectious new strains of the virus. Stratus and Nimbus are ...

CHICAGO, Ill. -- Scientists are continuing to develop new COVID-19 testing methods. Everything from throat swabs and saliva tests to breathalyzers are potential options. The federal government has ...