National Politics & Government Health & Safety Dr. Anthony Fauci talks about vaccine efficacy and second boosters 4:20pm April 08, 2022 Politics Health Medical Treatments National Share URL copied to clipboard! Play Pause There was an error loading the media player. Copyright 2022 NPR. To see more, visit https://www.npr.org. 300x250 Ad More All Things Considered National Vermont Judge releases Columbia University student Mohsen Mahdawi World News U.S. supports ally Israel at the International Court of Justice by Carrie Kahn 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate