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Venn diagram of the mutation sites in the RBDs of alpha (B.1.1.7, blue), beta (B.1.351, purple), gamma (B.1.351 P1, pink), delta (B.1.617.1, green), and omicron SARS-CoV-2 (B.1.1.529, red) compared to wild-type SARS-CoV-2 (Wuhan variant). Black font color indicates mutations shared by several variants, while mutations specific for one variant are indicated by the corresponding font color.
