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Advice on interpreting home COVID-19 tests --researchers

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These days, many people use at-home COVID-19 tests when they feel ill, rather than going out to get tested by a professional. (That’s when they bother to test at all.) But for all their convenience, the antigen tests commonly used at home have never been as accurate as PCR tests done in a lab—and the continued mutation of the virus raises additional concerns about their performance...

... researchers cautioned in a recent review article that people who are symptomatic shouldn’t assume they’re COVID-free based on a single negative antigen test result. Although it's a hard sell for people who no longer take precautions, the ideal scenario is for someone to stay isolated—or at least wear a mask when around other people—and test again around day four of symptoms....

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