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A cheap antidepressant lowers the risk of Covid hospitalization, a large study finds.

Patients Must Be Warned of Breast Implant Risks, F.D.A. Says

Starting next year, some immunocompromised people may receive a fourth Covid vaccine dose, the C.D.C. says.

A cheap antidepressant lowers the risk of Covid hospitalization, a large study finds.

Pregnant and breastfeeding women are slower to respond to vaccination, researchers report.

Merck Will Share Formula for its Covid Pill With Poor Countries

AstraZeneca’s vaccine comes with a slightly higher risk of a nerve syndrome but not worse than from Covid, a study finds.

Moderna’s Covid vaccine produces a strong immune response in younger children, the company said.

Some federal advisers have misgivings over whether boosters are widely needed.

Are Vaccine Boosters Widely Needed? Some Federal Advisers Have Misgivings

Coronavirus vaccines should begin soon for children 5 and up.

Here’s what you need to know to navigate the C.D.C.’s new mix-and-match vaccine strategy.

A limited C.D.C. study finds no significant change in hospitalization outcomes during the U.S. Delta wave.