Antibody testing shows whether you've had the COVID-19 virus in the past. It's not the same as testing to see whether you have the virus now.

STATEN ISLAND, N.Y. — With the terrifying coronavirus (COVID-19) pandemic of 2020 behind us and the world now returned to normal, many people have moved away from vaccination or even testing for the ...

There are three broad categories of coronavirus tests in the U.S. Two diagnose whether you have an active infection, and a third indicates if you previously had the virus. Most tests look for bits of ...

The question quickly arose whether existing rapid antigen tests could detect newly emerging variants. Using clinical samples obtained from diagnostic labs throughout the U.S. from 2020 to 2023, the ...

Know the symptoms of COVID-19 in children, what to do if your child appears sick and how to keep your family healthy.