A new COVID-19 variant spreading across the United States may cause an extremely painful sore throat—dubbed the "razor throat"—among its symptoms. The new "Nimbus" strain, also known as COVID-19 NB 1.

A new Covid-19 variant, NB.1.8.1, nicknamed "Nimbus," is spreading globally, including in the US and Asia. While more transmissible, it doesn't appear more dangerous. A key symptom is a severe sore throat,

The newest variant, NB.1.8.1, also known as Nimbus, is now widespread in California and across the United States. The new variant comes with increased transmissibility, and some are reporting an unpleasant symptom: “ razor blade throat ,” or a severe sore throat.