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New omicron subvariants now dominant in the U.S., raising fears of a winter surge

New COVID variants that are highly immune evasive have overtaken BA.5 to dominate in the U.S. Experts warn this means more reinfections and a possible winter surge.

Step aside, BA.5. The new variants BQ.1 and BQ.1.1, appear to be among the most adept yet at evading immunity from previous infection and vaccination.

(Image credit: Spencer Platt/Getty Images)


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