AstraZeneca vaccine is 79% effective against symptomatic Covid-19, company says - CNN

AstraZeneca's Covid-19 vaccine showed 79% efficacy against symptomatic disease and 100% efficacy against severe disease and hospitalization in a new, US-based clinical trial, the company said Monday. https://www.cnn.com/2021/03/22/health/astrazeneca-vaccine-efficacy-us-based-clinical-trial/index.html