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  2. Mar 16, 2021 · With the FDA’s emergency use authorization of the Johnson & Johnson vaccine on Feb. 27, the U.S. now has three highly effective vaccines against COVID-19. All three vaccines – Johnson & Johnson, Pfizer, and Moderna – completely prevented hospitalizations and deaths in clinical trials, which is why public health experts are recommending ...

  3. Jan 6, 2022 · The Johnson & Johnson COVID-19 vaccine demonstrated a profile that showed durability of effectiveness up to 6 months for hospitalizations and ICU admissions across the study period, with a modest increase in breakthrough infections starting in month 4.

  4. Apr 21, 2021 · This international, phase 3 ENSEMBLE trial showed the efficacy of a single dose of the Ad26.COV2.S vaccine in preventing Covid-19. Efficacy against moderate to severe–critical Covid-19...

    • Jerald Sadoff, Glenda Gray, An Vandebosch, Vicky Cárdenas, Georgi Shukarev, Beatriz Grinsztejn, Paul...
    • 2021
  5. Sep 21, 2021 · The largest real-world evidence study for a COVID-19 vaccine reported to date in the U.S. demonstrated stable vaccine effectiveness of 79 percent (CI, 77%-80%) for COVID-19-related infections and 81 percent (CI, 79%-84%) for COVID-19-related hospitalizations.

  6. Apr 19, 2024 · Efficacy: Overall, 66.1% efficacy in preventing moderate to severe COVID-19 in adults 28 days or more after vaccination, but efficacy was higher in the U.S. population (72% efficacy in...

  7. Feb 9, 2022 · The primary end points were vaccine efficacy against moderate to severe–critical Covid-19 with onset at least 14 days after administration and at least 28 days after administration in...

  8. Jan 20, 2022 · The benefits of Janssen and mRNA COVID-19 vaccination over 180 days per million fully vaccinated persons*** aged ≥18 years were assessed, including 1) COVID-19 hospitalizations prevented, based on rates during the week ending November 13, 2021 ††† and 2) age- and vaccine-specific vaccine effectiveness estimates from the Influenza and ...

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