4 ms·
No. The full trial was on 30,000 people, every phase 3 trial picks a certain number of infections to stop at in order to draw results. Of the control group, 90
by dj_mc_merlin 6y ago
No. The full trial was on 30,000 people, every phase 3 trial picks a certain number of infections to stop at in order to draw results. Of the control group, 90 something got COVID, while only 5 of the vaccinated group got it in the same timespan. This is considered a big enough difference to call the vaccine effective (so far).