A recent study put the Pfizer vaccine at a 97% hospitalization prevention rate, which is much better than the AZ one. How comparable all these studies is a goo

A recent study put the Pfizer vaccine at a 97% hospitalization prevention rate, which is much better than the AZ one. How comparable all these studies is a good question. https://www.cidrap.umn.edu/news-perspective/2021/05/real-world-studies-detail-high-pfizer-covid-vaccine-protection https://www.cidrap.umn.edu/news-perspective/2021/05/real-wor...