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CDC Study Finds Updated COVID-19 Vaccine 54% Effective

Despite promising effectiveness against symptomatic infection, vaccine uptake remains low in the U.S.

FILE - A healthcare worker fills a syringe with the Pfizer COVID-19 vaccine at Jackson Memorial Hospital on Oct. 5, 2021, in Miami. Lawyers for a group of Navy SEALS and other Navy personnel who oppose a COVID-19 vaccination requirement on religious grounds want a federal appeals court to keep alive their legal fight against the Biden administration, even though the requirement has been lifted. (AP Photo/Lynne Sladky, File)
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Overview

  • The latest COVID-19 vaccine, updated to target recent variants, is 54% effective at preventing symptomatic infection in adults, according to a CDC study.
  • Despite the vaccine's effectiveness, uptake remains low, with only 22% of U.S. adults and 11% of children having received the shot.
  • The vaccine shows promise against the JN.1 variant, currently the most common strain in the U.S., and other circulating lineages.
  • Future studies by the CDC will focus on the vaccine's effectiveness in preventing severe disease, including hospitalizations.
  • Health experts emphasize the importance of vaccination, especially for high-risk individuals, to provide added protection against COVID-19.