Research shows that two Pfizer vaccine doses offer less protection against Omicron than against Delta
The first major real-world study of how vaccines hold up against Omicron found that two injections from Pfizer Inc. and BioNTech SE’s Covid-19 vaccine reduced the risk of hospitalization by 70% for patients infected with the highly mutated variant. The study, by South Africa’s largest private health insurer, Discovery Ltd., found that while Omicron reduced … Read more
