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.

A new COVID strain has become increasingly more common in the U.S. in recent weeks and can cause a painful symptom that some are calling "razor blade throat." COVID variant, NB.1.8.1, nicknamed Nimbus,

The COVID-19 variant that may be driving a recent rise in cases in some parts of the world has earned a new nickname: “razor blade throat” COVID. That's because the variant — NB.1.8.1. or “Nimbus” — may cause painful sore throats.