Pfizer-BioNTech vaccine performs as well in the real world as in clinical trials, new study concludes

Pfizer and BioNTech’s Covid-19 vaccine performed as well in the real world as it did in the clinical trial that led to its use, a large study conducted in Israel concluded.

The study, published Wednesday in the New England Journal of Medicine, is the largest to date assessing the effectiveness of the vaccine, comparing all illness, severe illness, and hospitalizations as well as deaths between 600,000 pairs of vaccinated and unvaccinated people.