COVID levels in the U.S. remain high, according to wastewater detections, which is a retreat from the CDC’s label of “very ...

The XEC COVID variant has spread rapidly in some European countries, and it's now been reported in some U.S. states. But ...

Dubbed a "more contagious" Covid variant -- a hybrid of earlier Omicron subvariants, KS.1.1 and KP.3.3 -- it was first ...

Currently, KP.3.1.1 accounts for over half of all COVID cases in the U.S. The next closest subvariant circulating is KP.2.3, ...