How effective are the FDA-authorized vaccines? ↓
All three vaccines have proven to be equally effective at preventing hospitalization and death related to COVID-19. While Moderna and Pfizer require two doses and strict cold storage requirements, the Johnson & Johnson/Janssen vaccine only requires one dose and can be kept in regular refrigerators (potentially making transportation and distribution easier). In U.S. trials, the Johnson & Johnson vaccine was 72% effective in preventing symptomatic COVID-19 after one dose. The Pfizer vaccine is 95% effective and the Moderna vaccine is 94.1% effective at preventing symptomatic COVID-19 after two doses.
Learn more about the science and effectiveness of FDA-authorized COVID-19 vaccines here.
As of 4/23/21, the pause on the Johnson & Johnson/Janssen COVID-19 vaccine has been lifted.