New bird flu booster shot shows promise in phase 2 trial

NCT ID NCT05422326

First seen May 13, 2026 · Last updated May 13, 2026

Summary

This study tested whether a booster vaccine for a bird flu strain (H5N6) is safe and boosts immunity in adults. About 260 people who had either a prior H5N1 vaccine or a placebo took part. Researchers measured antibody levels after one or two booster shots to see how well the body could fight the virus.

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Contacts and locations

Locations

  • AccellaCare

    Winston-Salem, North Carolina, 27103, United States

  • Aventiv Research

    Columbus, Ohio, 43213, United States

  • Biogenics Research Institute

    San Antonio, Texas, 78229, United States

  • California Research Foundation

    San Diego, California, 92103, United States

  • Clinical Research Consortium Arizona

    Tempe, Arizona, 85283, United States

  • Clinical Research Consulting, LLC

    Milford, Connecticut, 06460, United States

  • Great Lakes Clinical Trials LLC

    Chicago, Illinois, 60640, United States

  • Heartland Research Associates, LLC

    Wichita, Kansas, 67207, United States

  • Innovative Research of West Florida, Inc.

    Clearwater, Florida, 33756, United States

  • J. Lewis Research, Inc/Foothill Family Clinic North

    Salt Lake City, Utah, 84109, United States

  • J. Lewis Research, Inc/Foothill Family Clinic South

    Salt Lake City, Utah, 84121, United States

  • J. Lewis Research, Inc/Jordan River Family Medicine

    South Jordan, Utah, 84095, United States

  • Optimal Research, LLC

    Huntsville, Alabama, 35802, United States

  • Optimal Research, LLC

    Melbourne, Florida, 32934, United States

  • PMG Research of Raleigh

    Raleigh, North Carolina, 27609, United States

  • Rochester Clinical Research, Inc

    Rochester, New York, 14609, United States

  • Sundance Clinical Research, LLC

    St Louis, Missouri, 63141, United States

  • The Center for Pharmaceutical Research

    Kansas City, Missouri, 64114, United States

Conditions

Explore the condition pages connected to this study.