Phase 3 trials show AstraZeneca COVID vaccine has up to 90% efficacy

The first full peer-reviewed results of phase 3 trials of the COVID-19 vaccine developed by AstraZeneca and Oxford University show that it is safe and up to 90% effective in preventing infection, supporting regulatory submissions for emergency use. The interim analysis, published today in The Lancet, identified no severe coronavirus disease or hospitalizations in pooled results from the 11,636 adults vaccinated in the United Kingdom and Brazil. Of the 11,636 adults, 131 (1.1%) had symptomatic COVID-19 more than 14 days after the second vaccine dose, including 30 of 5,807 (0.5%) in the COVID-19 vaccine group and 101 of 5,829 (1.7%) in the control group, indicating a vaccine efficacy of 70%