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Origin and significant spike mutations of the XBB subvariant. (A) the schematic diagram depict the recombinant origin of the XBB subvariant, which was resulted from recombination between two lineages of BA.2, which are BA.2.75 and BJ.1(BA.2.10.1). (B) Significant spike mutations of the XBB subvariant including receptor-binding domain (RBD) mutations.
