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Four Omicron sub-variants are in circulation across the world, WHO warns

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dailyrecord.co.uk

Four sub-variants of the Omicron Covid strain are currently in circulation across the globe, the World Health Organisation (WHO) has said.

The first version of the Omicron variant was identified towards the end of last year and was named B.1.1.529,This then developed into BA.1, which became highly transmissible and spread to 171 countries across the world.The strains resulted in a number of countries bringing back tight measures to contain the virus.BA.2 and BA.3 have also been identified as sub-variants of Omicron.

The UK Health Security Agency (UKHSA) last week said that there had been more than 400 cases of BA.2 found in England since December 6.

But there has so far been no evidence to suggest that BA.2 is more severe or is more transmissible than the original Omicron strain.It is not known where BA.2 was first originated, but it has so far spread to 40 countries - with more than 8,000 sequences of the strain reported since mid-November.The numbers of BA.3 infection remains low.Did you know you can keep up to date with the latest news by signing up to our daily newsletter?We send a morning and lunchtime newsletter covering the latest headlines every day.We also send coronavirus updates at 5pm on weekdays, and a round up of the week's must-read stories on Sunday afternoons.Signing up is simple, easy and free.You can pop your email address into the sign up box above, hit Subscribe and we'll do the rest.Alternatively, you can sign up and check out the rest of our newsletters here.Mutations of Covid strains are to be expected, with the Delta variant developing into more than 200 sub-variants.

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