Further analysis finds that Oxford-AstraZeneca COVID-19 vaccine is 76 percent effective 3 months after the first shot
:quality(85)//cloudfront-us-east-1.images.arcpublishing.com/infobae/7IGWCRZM2REJDHMQAUQAPMFJHY.jpg "Ecuador announces import of 5 million vaccine doses against Oxford-AstraZeneca coronavirus")
