A relatively new and seemingly highly contagious variant of Covid, NB.1.8.1, or the “Nimbus” variant, has been described by the World Health Organisation (WHO) as a “variant under monitoring” (VUM). That’s partly because it seems to be so easily transmissible,

The UK is grappling with the rise of a new Covid strain known as Nimbus or NB. 1.8.1. Britain has seen an increase of almost 10 per cent in Covid-related hospital admissions in the final week of May amid cautions from the World Health Organisation (WHO).

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.