COVID-19 Omicron BA.4

virus subvariant

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COVID-19

  • SARS-CoV-2
    In COVID-19

    …multiple sublineages of concern, including BA.4 and BA.5, which are highly infectious, and BA.2, which gave rise to XBB.1.5—a highly transmissible variant, noted for its heightened ability to bind to cells and to replicate.

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