coronavirus pandemic August 18, 2021 8:49 am

Asking a Doctor: Do I Need a COVID Vaccine Booster?

Getting a third shot of Pfizer or Moderna’s COVID-19 vaccine could provide an immunity boost as the virus surges again thanks to the Delta variant. NBC News medical contributor Dr. Natalie Azar explains why the U.S. might recommend a booster shot for already vaccinated people, and what that means for the future of getting COVID under control nationally.

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