AstraZeneca's Oxford coronavirus vaccine is 70% effective, data shows

Drugmaker AstraZeneca announced on Monday that its experimental coronavirus vaccine has shown an average efficacy of 70% in its large scale trials -- the latest of several vaccine trials worldwide to post their results this month.

source https://www.cnn.com/2020/11/23/europe/astrazeneca-oxford-coronavirus-vaccine-intl/index.html