A 2022 study estimates that at-home flu tests have a sensitivity of about 63% if the test is performed within 72 hours of ...

WASHINGTON -- President Donald Trump appeared in public Friday evening for the first time since being stricken by COVID-19, boarding his Marine One helicopter for a flight to a military hospital as ...

Taking a COVID-19 test at home seems simple enough: If you get a line, you're positive for the coronavirus. But what if your results aren't so obvious? For instance, if you only get a very faint line ...

You’ve tested positive for COVID-19. Now what? The short answer for those in the U.S.: Stay home and avoid others. Tell the people you’ve been in close contact with that you tested positive. And if ...

Stay on top of what’s happening in the Bay Area with essential Bay Area news stories, sent to your inbox every weekday. Bay Area-raised host Ericka Cruz Guevarra brings you context and analysis to ...

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