The COVID-19 vaccine targeting the original strain of the virus as well as two substrains of the omicron variant will now be used for all vaccinations...
The U.S. Food and Drug Administration updated its approval Tuesday of the Pfizer-BioNTech booster vaccine, making it available to some children under age 5. Before this...
Public health officials in Alameda, Contra Costa, San Mateo and Marin counties announced that they would temporarily halt use of the vaccine, which was developed by...