People Exposed to Coronavirus May Need to Take as Many as Three At-Home Tests, F.D.A. Says

The U.S. Food and Drug Administration issued a new recommendation on Thursday that asymptomatic people who are using coronavirus antigen tests take at least three tests, each spaced 48 hours apart, to reduce the odds of missing an infection. People who have Covid-19 symptoms should take at least two tests, 48 hours apart, according to the agency. The new guidelines come as the highly transmissible BA.5 subvariant of Omicron continues to spread, and after the Centers for Disease Control and Prevention eased its recommendation for routine surveillance testing in most circumstances.