Last week, I was about to go on a date, and because I'm severely immunocompromised, we agreed he would take a COVID test using one of my rapid home PCR tests. It was a courtesy—he felt perfectly fine— ...

Medically reviewed by Kate Colby, MPH People with asymptomatic or mild COVID illness generally test negative after nine days, but a polymerase chain reaction (PCR) test can still be positive for up to ...

If you use an antigen test, a positive result is reliable, but a negative test is not always accurate. If your antigen test is negative, take another antigen test after 48 hours or take a PCR test ...

At-home COVID-19 tests have become commonplace for many households, but knowing when exactly to take a rapid test — or when to throw old ones out — isn't always straightforward. Here's what ...

If you want to take only one test, the CDC recommends what's known as PCR test for the most reliable result.

Gene-cutting diagnostic tests could be as easy as a rapid COVID test and as accurate as PCR ...