Quote Originally Posted by lisvaneblue View Post
The maths do make sense. 101 of 10,000 got Covid when given a placebo. In those given the vaccine only 30 got it, which is 70% less than the placebo group, so it's 70% effective.
Interesting point about the group given a half dose first. No doubt this will be investigated further.
Yes particularly as we have so many doses. I guess even 70 is considered good when our regular flu vaccine is about 50%.