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

As anyone who has had COVID multiple times knows, no two infections are exactly the same, but the constellation of symptoms ...

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 newest variant is called XFG, or “Stratus.” It was first detected in March and has now surpassed the former “Nimbus” ...