AstraZeneca vaccine safe and effective in U.S., Chile, Peru trialshttps://www.reuters.com/article/us-health-coronavirus-astrazeneca-usa/astrazeneca-vaccine-79-effective-in-u-s-trial-panel-finds-no-higher-risk-of-clots-idUSKBN2BE0NJ by pasttense01 • 5 years ago 203 285 5 years agoREreuters.com