Jan 8, 2022
You may recall the much-reported “95% efficacy” of the vaccine against COVID-19. We all assumed that if we were vaccinated, we would then only have a 5% chance of becoming infected. Sounds great, but the statement is misleading. In the Pfizer study, only 8 out of 18,198, or 0.043% of participants who received the vaccine, contracted COVID, while 162 out of 18,325, 0.884% in the control group who received injections of saline became infected. Therefore, while there was a Relative Risk Reduction of 95%, the Actual Risk Reduction was a mere 0.84%.