National Health & Safety AstraZeneca Chastised For For Using Outdated Data To Claim A Vaccine Efficacy Of 79% 4:25pm March 23, 2021 by Joe Palca Health Medical Treatments National Share URL copied to clipboard! Copyright 2021 NPR. To see more, visit https://www.npr.org. 300x250 Ad More All Things Considered Human Interest The search into Pope Leo's family roots by Tinbete Ermyas National Supreme Court faces new headwinds with roughly two weeks left in the term by Nina Totenberg 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate