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

CDC tracks rising COVID cases in 45 states; NB.1.8.1 “Nimbus” leads U.S. infections while severe illness remains low.

A new COVID-19 variant, Stratus (XFG), has been detected in Arizona and is spreading globally. Stratus is a descendant of the ...

However, COVID activity remains well below the level seen last summer at this point—and it's too soon to say how bad this season will be.

COVID is on the rise again. The uptick was first registered in Northern California, but has also started being seen in Southern California more recently.

The “razor blade sore throat” was a common symptom when the variant cropped up in China, WebMD reported and has been found in cases worldwide.