Ian Gough.
Regarding the pfizer vaccines, can anyone explain what it meant by this: "The Pfizer and BioNTech covid-19 vaccine may provide some early protection, starting 12 days after the first dose, the peer reviewed results of a phase III trial have found.
The study, published in the New England Journal of Medicine,1
found that vaccine efficacy between the first and second doses was 52% (95% credible interval 29.5% to 68.4%)."
(
https://www.bmj.com/content/371/bmj.m4826 posting source because I don't know if there is more up-to-date information).
It's obviously an incredibly difficult decision to make regarding how to roll-out vaccines with speed of highest importance for vulnerable people, and some protection much better than none at all.