New bird flu booster shot shows promise in early trial
NCT ID NCT05422326
First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tested a booster vaccine for H5N6 bird flu in about 260 adults. Some had previously received an H5N1 bird flu vaccine, while others had not. The goal was to see if the booster was safe and triggered a strong immune response. Participants received one or two doses of the H5N6 vaccine and were monitored for about 7 months.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- MF59-adjuvanted H5N6 bird flu vaccine
- What this could lead to
- If successful, this could help create a strategy to quickly boost immunity against new bird flu strains, potentially preventing a future pandemic.
- What could go wrong
- This is a Phase 2 study with only 260 participants, so results may not apply to everyone. The vaccine targets a specific bird flu strain, and its effectiveness against other strains is unknown.
This is an AI summary of the original study and may miss details. Read our disclaimer.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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AccellaCare
Winston-Salem, North Carolina, 27103, United States
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Aventiv Research
Columbus, Ohio, 43213, United States
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Biogenics Research Institute
San Antonio, Texas, 78229, United States
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California Research Foundation
San Diego, California, 92103, United States
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Clinical Research Consortium Arizona
Tempe, Arizona, 85283, United States
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Clinical Research Consulting, LLC
Milford, Connecticut, 06460, United States
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Great Lakes Clinical Trials LLC
Chicago, Illinois, 60640, United States
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Heartland Research Associates, LLC
Wichita, Kansas, 67207, United States
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Innovative Research of West Florida, Inc.
Clearwater, Florida, 33756, United States
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J. Lewis Research, Inc/Foothill Family Clinic North
Salt Lake City, Utah, 84109, United States
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J. Lewis Research, Inc/Foothill Family Clinic South
Salt Lake City, Utah, 84121, United States
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J. Lewis Research, Inc/Jordan River Family Medicine
South Jordan, Utah, 84095, United States
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Optimal Research, LLC
Huntsville, Alabama, 35802, United States
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Optimal Research, LLC
Melbourne, Florida, 32934, United States
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PMG Research of Raleigh
Raleigh, North Carolina, 27609, United States
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Rochester Clinical Research, Inc
Rochester, New York, 14609, United States
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Sundance Clinical Research, LLC
St Louis, Missouri, 63141, United States
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The Center for Pharmaceutical Research
Kansas City, Missouri, 64114, United States
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