New study to track RSV Shot's Real-World power in hospitalized infants
NCT ID NCT07485907
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study will look back at medical records of 1,000 babies under 1 year old who were hospitalized with bronchiolitis. Researchers want to see if a new medicine called nirsevimab helped prevent severe RSV infections. The goal is to understand how well the shot works in real life during the 2025/2026 season.
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.
- Participants
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About 1,000 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Mar 2026
An estimate. Start dates often move.
- Expected to finish
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Mar 2027
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.
Who is studied
children hospilalized for bronchiolitis
- Ages
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1 day to 12 months
- 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.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Children under 12 months * Treated at one of the 12 study sites * From October 15, 2025 to February 15, 2026 * For acute bronchiolitis defined according to current national and international recommendations * Hospitalized and * RSV testing * Known nirsevimab immunization status for the ongoing 2025/2026 season Exclusion Criteria: * Refusal to participate by the legal representative * Maternal immunization with abrysvo after September 1st 2025
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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 places running it
1 site. The list below names each one and where it is.
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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.
Contacts and locations
Locations
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ACTIV
Créteil, 94000, France
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Other studies related to the condition(s) this trial covers.
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