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.Nicknamed "Nimbus,

The UK has reported cases of the new Covid variant, Nimbus or NB. 1.8.1, with a rise in Covid-related hospital admissions by almost 10% in the last week of May, following a warning from the World Health Organisation (WHO). Sufferers of the new variant have described a "razor blade throat" symptom.

A highly contagious new COVID variant is spreading across the United States. It's called NB.1.8.1, also known as Nimbus.