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Fmr. FDA commissioner says it was 'prudent' to pause J&J vaccine

The Pfizer CEO said a third dose is likely and there may be an annual booster. Dr. Scott Gottlieb, former FDA commissioner, joins 'Closing Bell' to discuss the decision by the CDC and the FDA to pause the J&J vaccine. He also talks about when it may be possible for the U.S. to reach herd immunity.

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