CDC

The Centers for Disease Control and Prevention added to research suggesting the Omicron variant can lead to reinfections that are often accompanied by mild Covid-19 symptoms, as new cases soared across the U.S.States reported 512,553…

VideotranscriptBacktranscriptN.Y.C. to Keep Vaccine Mandate for Private Employers, Mayor-Elect SaysMayor-elect Eric Adams vowed to retain New York City’s vaccine mandate for private-sector employees, which was put in place by Mayor Bill…

A street party in Rio ahead of the Carnival in 2020.Credit...Carl De Souza/Agence France-Presse — Getty ImagesRIO DE JANEIRO — While Rio de Janeiro’s renowned Carnival parade will go on, the city will cancel its street parties, which…

Schools can use frequent testing to keep students in class after exposure to someone with Covid-19, federal officials said, embracing a strategy some educators and parents have adopted to keep children out of home quarantines.The Centers…