Astra/Zeneca’s share price has plummeted on fears that the vaccine will not be licensed for use in the USA.
Investors are doubting the results.
AZ originally claimed 70% effectiveness. That was bumped up to 90% on the results from two doses. But that turns out to have been done by error. A more clinical test of Brazilians only gave a 62% result.
There was criticism that the trial did not test on any older people, anyone over 55 was excluded.
62% is still impressive, but a third less than the other two. Have we been slightly misled?
https://www.theguardian.com/world/2020/nov/26/scrutiny-grows-over-oxford-universityastrazeneca-vaccine