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.

California faces new Covid-19 threat from subvariant Nimbus, causing severe throat pain and raising concerns among health officials.

A new COVID-19 variant, nicknamed Nimbus, is rising around the world — including in California — and known for giving “razor blade throat” symptoms.