With COVID-19 vaccines now being widely available in the U.S., I’ve seen various interpretations of vaccine efficacy rates. As one example, the paper disseminating the study on the efficacy of BioNTech and Pfizer’s vaccine BNT162b2 states in its results section:
BNT162b2 was 95% effective in preventing Covid-19
The intent of this post is to clarify the interpretations of such numbers.
Author(s): Yeng Miller-Chang
Publication Date: 15 July 2021
Publication Site: Math, Music Occasionally, and Stats