Which flu vaccine packs a bigger punch for people with HIV?
NCT ID NCT07644546
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study will compare two enhanced flu vaccines—one with an adjuvant (MF59) and one with a higher dose—in 350 adults living with HIV. The goal is to see which vaccine triggers a stronger immune response. Participants will receive one shot and have their antibody levels checked after 28 days.
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 influenza vaccine and high-dose influenza vaccine
- What this could lead to
- If this trial succeeds, it could show which flu vaccine works best for people with HIV, leading to better protection during flu season.
- What could go wrong
- This trial hasn't started yet and is relatively small (350 people). Results may not apply to all people with HIV, and the vaccines may not prevent infection entirely.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 350 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Sep 2026
An estimate. Start dates often move.
- Expected to finish
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Dec 2028
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * PWH aged ≥18 years Exclusion Criteria: * History of confirmed severe adverse effects owing to any type of influenza vaccine, including anaphylaxis and Guillain-Barré syndrome. * Severe coagulopathy which causes contraindication for vaccination. * Already vaccinated with any type of 2026-2027 influenza vaccines. * Having diagnosed with influenza one month before vaccination.
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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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
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