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U.S. officials should watch Boris Johnson's lockdown announcement Monday as the CDC says that by late March B.1.1.7, the more transmissible COVID-19 variant first identified in Britain, could dominate the U.S.
U.S. officials should watch Boris Johnson's lockdown announcement Monday as the CDC says that by late March B.1.1.7, the more transmissible COVID-19 variant first identified in Britain, could dominate the U.S.