The variant, known as NB.1.8.1, has been nicknamed by some as “razor blade throat” due to the painful symptom.

So far, 15 U.S. states have positive Nimbus cases, including Rhode Island, New York, Vermont, and Massachusetts.

COVID-19 appears to be on the rise in some parts of California as a new, highly contagious subvariant — featuring “razor ...

That’s because the variant — NB.1.8.1. or “Nimbus” — may cause painful sore throats. The symptom has been identified by ...

A new COVID-19 variant nicknamed “razor blade throat” is making its way through parts of California. While case numbers remain relatively low in San Diego County, health experts are warning people not ...

The N.B.1.8.1 variant was first detected in January 2025. By the end of April, it was the dominant strain in both Hong Kong ...