B.1.1.7 variant of COVID-19 spreading rapidly in United States LiveStream Thursday, April 01, 2021 Science Leave a Reply A genetic analysis of virus samples suggests that the UK-originating variant, which is 40-50 percent more transmissible, entered the country in late November 2020. source https://www.sciencedaily.com/releases/2021/03/210331103627.htm
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