All COVID-19 Discussion GOES HERE

[Sarcany]

Speedy wrote:
The Pfizer phase 3 trial, which has enrolled nearly 44,000 people, started in late July. Participants received a second dose 21 days after the first. The reported 90 percent efficacy was measured seven days after the second dose.

So, is Pfizer claiming 90% efficacy on the basis of a trace of antibodies present in their blood? It seemed from their PR blitz that they were looking at actual COVID cases among the participants and doing a statistical analysis.