New mRNA flu shot passes first safety test in humans

NCT ID NCT05446740

First seen Mar 12, 2026 · Last updated May 14, 2026 · Updated 8 times

Summary

This early-stage study tested a new mRNA-based flu vaccine from GSK in 324 healthy younger (18-45) and older (60-80) adults. The main goal was to see if the vaccine is safe and triggers an immune response. Researchers monitored side effects like pain, fever, and fatigue, and measured antibody levels in the blood.

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This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.

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Contacts and locations

Locations

  • GSK Investigational Site

    Edegem, 2650, Belgium

  • GSK Investigational Site

    Ghent, 9000, Belgium

  • GSK Investigational Site

    Halifax, Nova Scotia, B3J 3G9, Canada

  • GSK Investigational Site

    Sherbrooke, Quebec, J1L 0H8, Canada

  • GSK Investigational Site

    Madrid, 28006, Spain

  • GSK Investigational Site

    Madrid, 28046, Spain

  • GSK Investigational Site

    Madrid, 28222, Spain

Conditions

Explore the condition pages connected to this study.