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CDC director says no downside to second Covid booster amid confusion over fourth shot

03:59

In an exclusive interview with NBC News, CDC Director Rochelle Walensky laid out her agency’s guidance for who should and should not receive a second Covid-19 vaccine booster, saying there’s no downside to getting a fourth shot and that the omicron variant counts a “natural boost.” NBC News’ Erika Edwards breaks down her exclusive interview with the CDC director.