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 ...

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

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

A new Omicron subvariant has caused infections and deaths in South and Southeast Asia. Europe may see a spike after ...

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 ...

A new COVID variant called NB.1.8.1, aka Nimbus, is spreading in the U.S. and causing an incredibly painful sore throat, ...

Childhood vaccinations coverage slowed significantly even before the onset of the Covid-19 pandemic, a new study found.