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The virus is an airborne threat, the C.D.C. acknowledges.

Want a coronavirus vaccine? U.S. pharmacies say walk right in.

The pandemic has made some Americans rethink the daily shower.

The pandemic has made some Americans rethink the daily shower.

The pandemic has made some people rethink the daily shower.

Pfizer says it will seek clearance in September for its vaccine to be used in children aged 2 to 11.

The F.D.A. is set to authorize the Pfizer-BioNTech vaccine for those 12-15 years old by early next week.

The F.D.A. is set to authorize the Pfizer-BioNTech vaccine for those 12-15 years old by early next week.

Pfizer and Moderna vaccines are 94 percent effective at preventing hospitalization in older adults, a study finds.

Vaccinated Americans don’t need masks outdoors in small groups or when biking and running, the C.D.C. says.

When do we have to wear a mask outside? The C.D.C. says less often, and here’s how and why.

The C.D.C. eases some guidelines on wearing a mask outdoors.

Vaccinated Americans don’t need masks outdoors in small groups or when biking and running, the C.D.C. says.

Vaccinated Americans don’t need masks outdoors in small groups or when biking and running, the C.D.C. says.

Vaccinated Americans don’t need masks outdoors in small groups, when dining outside, or biking and running, the C.D.C. says.

Biden is expected to announce new guidance on wearing masks outdoors.

Biden is expected to announce new guidance on wearing masks outdoors.

Fauci and other top U.S. health officials stress the urgency of vaccinations and their safety.

Summer camp advice — keep masks and distancing — gets an update from the C.D.C.

A C.D.C. panel recommends J.&J. shots restart with a label noting the risk of very rare blood clots.