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  1. Feb 1, 2024 · New data from CDC show that the updated COVID-19 vaccines were effective against COVID-19 during September 2023 – January 2024, including against variants from the XBB lineage, which is included in the updated vaccine, and JN.1, a new variant that has become dominant in recent weeks. The virus that causes COVID-19 will continue to evolve.

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  3. 3 days ago · 2023-2024 Pfizer-BioNTech COVID-19 vaccine. In December 2020, the Pfizer-BioNTech COVID-19 vaccine two-dose series was found to be both safe and effective in preventing COVID-19 infection in people age 18 and older. This data helped predict how well the vaccines would work for younger people. The effectiveness varied by age.

  4. May 6, 2021 · In a multistate network of U.S. hospitals during January–March 2021, receipt of Pfizer-BioNTech or Moderna COVID-19 vaccines was 94% effective against COVID-19 hospitalization among fully vaccinated adults and 64% effective among partially vaccinated adults aged ≥65 years. What are the implications for public health practice?

  5. The Pfizer and Moderna vaccines are strongly recommended as safe and effective at preventing serious illness or death from COVID-19. From December 2020 to December 2021, about 470 million doses of COVID-19 vaccine have been given in the U.S.

  6. Dec 30, 2021 · Pfizer-BioNTech reported 95% efficacy (CI: 90.3%97.6%) for their vaccine, with low serious adverse event rates in both the vaccinated and control groups ( Polack et al., 2020 ). The vaccine was initially FDA-approved for ages 16 and over, requiring two doses at a recommended interval of 21 days.

  7. Dec 8, 2020 · In a 53-page briefing document the FDA said data indicated that Pfizer's mRNA vaccination course worked well in thousands of people of various ages, races, and sexes who tested it in six...

  8. Aug 26, 2021 · Vaccine effectiveness was 86% 212 weeks after vaccination and 84% at 1324 weeks. Vaccine effectiveness was sustained among groups at risk for severe COVID-19. What are the implications for public health practice?

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