That’s great news. The vaccines may turn out to be less than 90% effective when all is said and done, but even so they’re likely to be far more effective than expected.
But there’s other good news that might be overlooked: the subjects in the control groups did well too, though not as well as in the active groups.
The infection rate was around 0.4% in the Pfizer control group and around 0.6% in the Moderna control group.
There were 11 severe cases of COVID in the Moderna trial, out of 30,000 subjects, all in the control group.
There were 0 severe cases of COVID in the Pfizer trial in either group, out of 43,000 subjects.