COVID-19 vaccines

Doctor Still Optimistic About AstraZeneca Vaccine After Data Concerns

Clinical trial data for the AstraZeneca vaccine showed 100% effectiveness at preventing death and hospitalizations from COVID-19, but a federal review board express concern that the data was outdated. NBC News medical expert Dr. Natalie Azar says she’s still optimistic about the efficacy of the AstraZeneca shot and explains why.