Prognosis
BA.2 Variant Takes Hold in U.S. as New York Cases Start to Climb
CDC data show BA.2 accounts for more than a third of U.S. Covid cases and more than half in the Northeast
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More than a third of last week’s U.S. Covid-19 cases were caused by the omicron BA.2 subvariant, a notable increase from a week earlier when the strain was estimated to account for just under one in four cases, according to the U.S. Centers for Disease Control and Prevention.
The fast-growing lineage of the coronavirus is most common in New England and in the New York region, where it accounted for more than half of all new infections, according to agency projections.