The CDC has revealed that Western and Southern states had particularly elevated levels of COVID-19 viral activity ...

The new COVID-19 strainalso known as XFG—is a "variant under monitoring" by the World Health Organization (WHO).

As a group of advisers to the US Centers for Disease Control and Prevention meets this week to discuss Covid-19 vaccines and make recommendations on who should get the updated shot this season, a ...

After a relatively slow start to the respiratory virus season, Covid-19 levels in the United States began ramping up just ahead of the winter holidays. In previous years, Covid-19 levels have ...

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 US Food and Drug Administration has delayed granting full approval of Novavax’s Covid-19 vaccine despite it being on track to be cleared until Tuesday afternoon, a person familiar with the ...