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 health ...

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Add Yahoo as a preferred source to see more of our stories on Google. Over-the-counter multiplex tests for more than one illness may soon come to a pharmacy near you. Paco Burgada/iStock via Getty ...

A scratchy, sore throat, a relentless fever, a pounding head and a nasty cough—these symptoms all scream upper respiratory illness. But which one? Our team in Atlanta—composed of biomedical engineers, ...