An unusual and alarming symptom has emerged with the spread of a new COVID-19 variant called Nimbus (NB.1.8.1), which is rapidly spreading worldwide after being first detected in China in January. This variant is causing an increase in cases in the U.

A newer COVID-19 variant may be causing a severe sore throat in those who contract the infections. Here's what to know about "razor blade throat."

Nimbus, a new COVID-19 variant, is spreading in Asia. It shows immune evasion but low severity and early signs include a razor blade throat.