The XFG COVID-19 variant, aka "Stratus," is spreading rapidly in the U.S. as cases climb. Here's what to know about symptoms ...

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

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 region.

The KP.3.1.1 COVID-19 variant is the dominant strain of the virus, the latest projections from the Centers for Disease Control and Prevention (CDC) show. The agency's Nowcast data tracker, which ...