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 National Education How COVID shaped 3 graduating seniors' high school experience Helicopter crash kills Iran's president. Acting president to fill in until elections 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate