My questions are;
Has the vaccine now been tested on the over 55s?
How has the success rate gone from the 70s, to 95 percent?
I've been looking around online, but haven't been able to find the answers.
The last definitive thing I read was that trial results can't be a cobbling together of two results, when neither followed the protocol set out. (It didnt test a fair representation of age ranges, and it was never decided to do half the vaccine, then another dose afterwards)
This isn't a criticism, it's genuine interest.