A new COVID variant is spreading quickly in the U.S. and bringing with it a painful new symptom.

Variant NB.1.8.1 accounted for 0% of U.S. cases in April. By mid-June, it was estimated to be the cause of around 37% of ...

The Food and Drug Administration said Wednesday it has expanded existing warnings on the two leading COVID-19 vaccines about ...

Two new Omicron subvariants are gaining ground in the U.S. as some people report experiencing respiratory symptoms like ...

A new Covid-19 variant called NB.1.8.1, or Nimbus, represents about a third of new US Covid-19 cases. Dr. Leana Wen answers ...

Cases of the recently identified Covid-19 variant NB 1.8.1. are rising. Some have dubbed the variant "razor blade throat" for ...

Airport screening has detected the variant in travelers arriving in California, Washington, Virginia, and New York.

NB.1.8.1 is one of the latest variants of COVID-19, a "slightly upgraded version" of the LP.8.1 variant that is prominent ...

Covid cases are on the rise once again, with a new variant now accounting for a significant proportion of cases ...