COVID variant XBB.1.5 now accounts for 40 percent of cases in the US: CDC by Joseph Choi The omicron subvariant XBB.1.5 has rapidly spread to become the dominant COVID-19 mutation in the U.S., now accounting for 40.5 percent of all cases. The XBB.1.5 omicron subvariant as of this week has pushed out the BQ.1 and […]

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