In an interview with Lester Holt, CDC Director Dr. Rochelle Walensky says the agency is carefully watching new omicron cases in the U.S., while a majority of new Covid cases are from the delta variant. Walensky warns travelers to get their booster shots and take health precautions. » Subscribe to NBC News: [ Ссылка ]
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Delta vs. Omicron: CDC Director Discusses Coronavirus Variants
