If you've received a new omicron-specific Covid booster, you're the most protected you possibly can be against the virus. But there's a new batch of so-called "Scrabble" variants circulating globally.

Cases are also rising in Europe and the U.K., where these variants have taken hold.Dr. Peter Hotez, who co-directs the Center for Vaccine Development at Texas Children's Hospital, says he thinks of ...

The Omicron BA.5 subvariant is no longer the dominant cause of Covid-19 infections in the United States, according to estimates released Friday by the US Centers for Disease Control and Prevention.

A flurry of new Covid-19 variants appears to be gaining traction globally, raising fears of a winter surge. In the United States, these are BQ.1, BQ.1.1, BF.7, BA.4.6, BA.2.75 and BA.2.75.2. In other ...