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At-home COVID tests add a layer of precaution

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How accurate are at-home COVID tests?

First, impressive vaccines for COVID. Next up: The flu.

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Study: Pfizer vaccine provides 90% protection against hospitalization for 6 months

Second vaccine doses raise risk of myocarditis in young men

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Answers to your questions about COVID booster shots

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Worried about breakthrough infections? What vaccinated people need to know.

More than 80% of seniors are vaccinated. That’s ‘not safe enough.’

The delta variant in schools: What to know

The making of an Olympian

A master class in how to wipe out

Vaccine makers are asked to expand safety studies on children

Vaccinated and confused? Answers about masks, the delta variant and breakthrough infections