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All 32 London boroughs and the city of London. Bedford, Central Bedfordshire, Milton Keynes, Luton, Peterborough Hertfordshire 11 The new strain is 70 per cent more contagious and on the brink of overwhelming hospitals in the worst-hit areas. Mr Johnson told 18million people they must "sacrifice" Christmas this year. Travel and mixing households are banned from today under the new highest level resctrictions - with families elsewhere only allowed to form Christmas bubbles for one day on December 25 itself. The drastic move will dash families' hopes of Christmas together after a torrid year an...

Is this something unusual? There have been many mutations in the virus since it emerged in 2019. This is to be expected – SARS-CoV-2 is an RNA virus and these viruses mutate and change. Is this something to be worried about? Not enough is yet known about the new strain, but it is premature to make any claims about the potential impacts of virus mutation. But if the virus spreads faster it will be harder to control. However, there have already been various strains of Covid-19 with no real consequence. It could potentially be serious, but not enough is known, and the surveilla...