Anusha Swarna
The rapid spread of an alternative variant of coronavirus has been blamed for the introduction of strict tier four mixing rules for many people, strict restrictions on mixing at Christmas in England, Scotland and Wales, and other countries placing the United Kingdom on a travel ban.
So how has it gone from being non-existent to the foremost common sort of the virus in parts of England during a matter of months?
The government's advisers on new infections now say they need "high" confidence that it's more ready to transmit than other variants.
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