Health & Safety Preliminary Results Show AstraZeneca Vaccine Can Prevent COVID-19 7:52am March 22, 2021 by Joe Palca Health Share URL copied to clipboard! Play Pause There was an error loading the media player. Copyright 2021 NPR. To see more, visit https://www.npr.org. 300x250 Ad More Morning Edition World News Morning news brief Environment Science Could you go a whole week without buying new plastic? 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate