Pfizer and Moderna vaccines are powerfully effective against Covid-19, a C.D.C. analysis confirmed.

BY EMILY ANTHES | NYTimes Health | Disclosure

Here’s why the C.D.C. changed its mask advice.

BY APOORVA MANDAVILLI | NYTimes Health | Disclosure

Pfizer and Moderna vaccines are powerfully effective against Covid-19, a C.D.C. analysis confirmed.

BY EMILY ANTHES | NYTimes Health | Disclosure

Pfizer and Moderna vaccines are powerfully effective against Covid-19, a C.D.C. analysis confirmed.

BY EMILY ANTHES | NYTimes Health | Disclosure

How the United States Beat the Variants, for Now

BY CARL ZIMMER AND APOORVA MANDAVILLI | NYTimes Health | Disclosure

How the United States Beat the Variants, for Now

BY CARL ZIMMER AND APOORVA MANDAVILLI | NYTimes Health | Disclosure

‘We have all longed for this moment’: Vaccinated Americans now may go without masks in most places, the C.D.C. says.

BY RONI CARYN RABIN, APOORVA MANDAVILLI AND NOAH WEILAND | NYTimes Health | Disclosure