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A Third of U.S. COVID Now Caused by Omicron BA.2

Meanwhile, overall cases continue to fall

About one-in-three COVID-19 cases in the United States are now caused by the BA.2 Omicron sub-variant of the coronavirus, according to government data on Tuesday that also showed overall infections still declining from January's record highs.

Despite the rise of the extremely contagious sub-variant also seen in other countries, U.S. health experts say a major wave of new infections here appears unlikely.

U.S. COVID-19 infections have receded sharply since January, although a resurgence in parts of Asia and Europe have raised concerns that one will follow in the United States given previous patterns during the two years of the pandemic.

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