Different efficacyOne thing people might notice right away about the Johnson & Johnson vaccine is how it stacks up against Pfizer's and Moderna's in terms of efficacy. The Johnson & Johnson vaccine was given in different populations and at a different time, however. Quicker protectionWith the Johnson & Johnson vaccine, protection against moderate to severe disease starts about two weeks after people get vaccinated. The Johnson & Johnson vaccine uses viral vector technology. Only one case of anaphylaxis has been reported in the 44,000 people who have tested the Johnson & Johnson vaccine.

Source: The Nation March 01, 2021 00:33 UTC