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Delta Variant Now Makes Up Whopping 83 Percent of New U.S. COVID Cases: CDC

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“This is a dramatic increase, up from 50 percent for the week of July 3,” CDC Director Rochelle Walensky said Tuesday during a Senate committee hearing.

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An overwhelming majority of new COVID-19 cases have been caused by the Delta variant, the Centers for Disease Control and Prevention said Tuesday. CDC Director Rochelle Walensky said the Delta variant was responsible for 83 percent of new COVID-19 cases.

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