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. 2023 Sep 19;6:953. doi: 10.1038/s42003-023-05332-w

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© This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2023

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Fig. 6 — a Alpha variants. b Beta variants. c Delta variants. d Omicron variants and subvariants. e The ES areas where mutations have not yet been reported (color code refers to Fig. 2e).