AstraZeneca and the University of Oxford is 79% effective in preventing symptomatic illness and 100% effective against severe disease and More than 32,000 volunteers took part, mostly in America, but also in Chile and Peru.

And there were no safety issues regarding blood clots.

Around a fifth of the volunteers in this trial were over 65 and the vaccine - given as two doses, four weeks apart - provided as much protection to them as to younger age groups.

32,449명 참가(5분의 1이 65세 이상)
79% 예방 효과
100% 중증 예방 효과
혈전 안전 이슈 없음
65세 이상 연령군도 65세 이하 연령군만큼 보호 효과 있음

출처 : http://www.bbc.com/news/health-56479462

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기레기들 고작 79% 라 하려나? ㅎ