COVID-19: New Mutation of Delta Variant Under Close Watch in UK
Tests are underway to understand how much of a threat it may pose
Delta is the UK's dominant variant, but latest official data suggests 6 percent of COVID cases that have been genetically sequenced are of a new type.
AY.4.2, which some are calling "Delta Plus", contains mutations that might give the virus survival advantages. Tests are underway to understand how much of a threat it may pose.
Experts say it is unlikely to take off in a big way or escape current vaccines.
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