As Breakthrough Cases Increase, Is A Booster Shot Needed?

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Published on 29 Jul 2021, 23:27
As breakthrough cases are on the rise, the CDC and FDA say booster shots are not needed yet. However, that guidance may change as Pfizer’s vaccine data suggests a third dose might be needed to boost protection against the delta variant. Miguel Almaguer reports. » Subscribe to NBC News:
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As Breakthrough Cases Increase, Is A Booster Shot Needed?