A contagious new COVID-19 variant called NB.1.8.1, aka "Nimbus," is now dominant in the United States, CDC data show. What to know about symptoms and vaccines.

The Stratus displays symptoms akin to those seen in past Omicron subvariants, with common indicators including a ...

XFG is part of the Omicron family, of which there are now more than 1,000 known subvariants, but it’s rising rapidly in ...

A new strain of Covid, with a unique symptom, is circulating in the UK, accounting for a high proportion of cases in England. The new strain, called Stratus, has two variants, XFG and XFG.3, with ...

A new COVID-19 variant named "Nimbus" has been detected in the U.S. and is spreading rapidly. Here's what to know about ...

Intense throat pain is a key symptom of COVID-19 variant NB.1.8.1, referred to as "razor blade throat." Here's what to know.