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.

COVID-19 appears to be on the rise in some parts of California as a new, highly contagious subvariant — featuring "razor blade throat" symptoms overseas — is becoming increasingly dominant.