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There's still a lot of confusion around the best time to take a COVID test and where to get them. Here, experts share their ...

SARS-CoV-2 infections have been rising in the past month — global cases increased by more than 19,000 last month compared ...

A top biosecurity adviser at the Department of Health and Human Services who believed messenger RNA Covid vaccines should be ...

Vaccine effectiveness against COVID-19 infection dropped from 91% to 66% once the delta variant accounted for the majority of circulating virus, according to a study published Tuesday by the U.S.

The side effects of newly discovered COVID-19 strain XEC might not be as severe, but is part of the more contagious variant class, experts say. The Centers for Disease Control and Prevention (CDC) ...

Deaths from acute respiratory distress syndrome (ARDS) and sepsis spiked in the US during the COVID pandemic, and ...

The most common disease trajectories involved mental illnesses and neurologic, respiratory, and metabolic or digestive ...