Pregnant women needed for yellow fever vaccine study
NCT ID NCT06694766
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at how well the yellow fever vaccine works and how safe it is for pregnant women compared to non-pregnant women. Researchers will enroll 270 women who received their first yellow fever vaccine either during or outside pregnancy. The goal is to ensure the vaccine protects both mother and baby without causing harm.
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 270 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Mar 2025
- Expected to finish
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Mar 2030
An estimate. End dates often move.
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
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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Female participants only
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
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: Common : * Person over 18 years of age at the time of the first yellow fever vaccination * Female gender * Oral consent obtained after subject has been informed * Subject covered by Social Security with the exception of Aide Médicale d'Etat Specific to both groups : * For women vaccinated during pregnancy (case): Primary yellow fever vaccination during pregnancy * For women vaccinated outside pregnancy (control): Primary yellow fever vaccination outside pregnancy Exclusion Criteria: Criteria common to both sections (tolerance and immunogenicity): * Subject having received a second yellow fever vaccination * Persons unable to give informed consent for participation * Women born in areas where yellow fever is endemic * Female adults under legal protection (guardianship or trusteeship) Specific criteria for participants in the immunogenicity section: * Medical condition imcompatible with 18.5 mL blood * Women who have not given written consent to participate in the study. immunogenicity
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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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Medical Center of Institut Pasteur
RECRUITINGParis, 75015, France