Free at-home Covid tests can be ordered starting Monday. Here’s what you should know about when to test and what the results mean as new variants circulate.

When should you test for COVID? What if you're positive? Here's an explainer The federal government recently resumed its program of shipping out free COVID tests to households, which means many ...

While experts advise people who think they may have COVID-19 to test on day 1 of symptoms, a new study suggests that for people using home (rapid) kits, testing again on day 4 may yield the most ...