While the delta COVID-19 variant is the dominant strain in the U.S., it’s now officially the dominant strain worldwide “by far,” officials from the World Health Organization said during a Sept. 21 ...

COVID-19 viral activity is high in the U.S., according to CDC data. Here's a look at the latest, including test positivity by ...

“The antigen that the at-home tests look for has remained fairly stable even as the virus mutates and new strains of COVID ...

NEW YORK (WABC) -- The CDC is weighing a significant update to its mask information as the highly transmissible omicron variant sweeps across the nation. Federal health officials are expected to ...

PHILADELPHIA (WPVI) -- COVID-19 boosters could play a big role in keeping kids in school as the omicron variant surge continues. A CDC advisory panel will be discussing the extra dose on Wednesday for ...

A Centers for Disease Control & Prevention committee is meeting this week to discuss new guidelines for the Covid-19 vaccine.

SAN FRANCISCO (KGO) -- As coronavirus cases improve across the Bay Area and United States, local health officials are loosening safety guidelines. The latest number of confirmed cases in the U.S. can ...

PHILADELPHIA (WPVI) -- The Centers for Disease Control and Prevention reversed course Tuesday on some masking guidelines, recommending that even vaccinated people return to wearing masks indoors in ...

"The rules have changed. We have a different epidemic now that we did in May." Adding more insight into the CDC’s updated mask guidance, newly published details of the Provincetown outbreak raise ...