As Infections Rise, CDC Urges Some Vaccinated Americans to Wear Masks Again

Socially-distanced commuters wear face masks at Grand Central Station in Manhattan on Tuesday, July 27, 2021. Revising a decision made just two months ago, the Centers for Disease Control and Prevention said on Tuesday that people vaccinated against the coronavirus should resume wearing masks in public indoor spaces in parts of the country where the virus is surging. (Brittainy Newman/The New York Times)