Pfizer claim their vaccine is 95% effective

In a press release on November 9, 2020, Pfizer-BioNTech announce their preliminary phase 3 clinical trial data suggests their COVID-19 vaccine is more than 90% effective. [1, 2]

From a final analysis, released November 18, 2020, they said it was 95% effective stating: “Primary efficacy analysis demonstrates BNT162b2 to be 95% effective against COVID-19 beginning 28 days after the first dose;170 confirmed cases of COVID-19 were evaluated, with 162 observed in the placebo group versus 8 in the vaccine group”.  Those results had yet to be peer reviewed, but the media ran with the claim.