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  1. Nov 3, 2023 · In December 2020, the Pfizer-BioNTech COVID-19 vaccine two-dose series was found to be both safe and 91% to 95% 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.

  2. Feb 1, 2024 · Receiving an updated 2023-2024 COVID-19 vaccine can restore and provide enhanced protection against the variants currently responsible for most infections and hospitalizations in the United States. New data from CDC show that the updated COVID-19 vaccines were effective against COVID-19 during September 2023 – January 2024, including against ...

  3. The Pfizer-BioNTech vaccine requires two injections, given 21 days apart, to prime the immune system well enough to fight off the coronavirus. But because the vaccine is so new, researchers don ...

  4. Mar 11, 2021 · Dramatically lower COVID-19 disease incidence rates observed in individuals fully vaccinated with the Pfizer-BioNTech vaccine, based on real-world data gathered by the Israel Ministry of Health Data suggest Pfizer-BioNTech vaccine prevents asymptomatic SARS-CoV-2 infection Latest data analysis finds unvaccinated individuals were 44 times more likely to develop symptomatic COVID-19 and 29 times ...

  5. Apr 19, 2024 · The Pfizer/BioNTech vaccine is the first COVID-19 vaccine authorized for use in the U.S. and the first to be fully approved by the FDA. The companies released promising interim results from a ...

  6. Mar 5, 2024 · Vaccine effectiveness is a measure of how well vaccination protects people against health outcomes such as infection, symptomatic illness, hospitalization, and death. Vaccine effectiveness is generally measured by comparing the frequency of health outcomes in vaccinated and unvaccinated people. Absolute vaccine effectiveness is a term that can ...

  7. Mar 17, 2022 · The BNT162b2 (Pfizer-BioNTech) mRNA COVID-19 vaccine was recommended by CDC’s Advisory Committee on Immunization Practices for persons aged 12–15 years (referred to as adolescents in this report) on May 12, 2021, and for children aged 5–11 years on November 2, 2021 (1–4).

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