XBB

XBB: A fast-spreading new COVID-19 subvariant and part of a new class of Omicron variants

Clark Baisa Apr 27, 2023

In the United States, the Omicron subvariants BA.4 and BA.5 strains of COVID-19 are responsible for the vast majority of infections. According to William Schaffner, M.D., an infectious disease specialist and professor at Vanderbilt…

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