63 , 64 , 65 At present, the proportion of B1.1.7 has reached 44.1% and shows a significant trend of continuing to increase.
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Molecular evolutionary characteristics of SARS-CoV-2 emerging in the United States.
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63 , 64 , 65 At present, the proportion of B1.1.7 has reached 44.1% and shows a significant trend of continuing to increase.