(CNN) A batch of new studies published Wednesday show how well coronavirus vaccines work against worrying new variants -- and one indicates booster doses can help them work even better. The first nationwide study of coronavirus vaccination, done in Israel, showed Pfizer/BioNtech's vaccine works far better after two doses. The effectiveness against any documented infection with the B.1.351 variant was 75%," the researchers wrote in a letter to the New England Journal of Medicine. The company is also testing a vaccine booster that combines the original formulation with the B.1.351 specific formula. In another study, vaccine maker Novavax confirmed earlier findings that showed its vaccine protects against B.1.351.

Source: CNN May 05, 2021 20:55 UTC