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US FDA approves first mRNA flu shot from Moderna

The shot showed 26.6% better effectiveness than a licensed standard-dose flu vaccine in a late-stage trial of more than 40,000 adults.

  • On Wednesday, the Food and Drug Administration approved the United States' first mRNA-based flu vaccine for adults 50 and older, Moderna announced, offering what Moderna CEO Stephane Bancel called an "important new option for America's seniors."
  • The FDA initially declined to review the vaccine in February, citing inadequate trials despite conflicting internal feedback, but reversed course two weeks later and agreed to evaluate the shot.
  • Clinical trials involving over 40,000 adults found the vaccine about 27% more effective than standard shots during the 2024–25 season; an independent Advisory Committee unanimously voted in June that benefits outweigh risks.
  • Moderna expects the vaccine available this fall; however, the Centers for Disease Control and Prevention's Advisory Committee on Immunization Practices has not met since March, potentially delaying formal recommendations.
  • While an mRNA-based flu and Covid-19 vaccine was approved in Europe earlier this year, HHS Secretary Robert F. Kennedy Jr. canceled about $500 million in mRNA projects, claiming these vaccines fail to protect against infections.
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The spokesman-Review broke the news in Spokane, United States on Wednesday, August 5, 2026.
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