Why is the "VE-D" number nowhere near the original 95% efficacy number widely reported for the Pfizer/Moderna vaccines when they were originally approved?
Is it different methodology or is it changed nature of the pandemic?
Is it different methodology or is it changed nature of the pandemic?
https://news.ycombinator.com/item?id=29208007
(New target for Covid-19 vaccines identified: https://www.ucl.ac.uk/news/2021/nov/new-target-covid-19-vacc...)
Efficacy is just estimation after some tests. It must be at least 50% for vaccine to be accepted. 95% is bigger than 50%.