Clinical trial No longer in our active list Interventional Ages 18 to 50

Testing a yellow fever vaccine in healthy adults

Official title: Yellow Fever Human Infection Model With YF-17D

Run by Leiden University Medical Center · NCT05901454 · Data updated 2026-05-14

This study is no longer in our active list. It may have stopped recruiting or finished. The details below are as of 2026-05-14 and are kept for reference. Check ClinicalTrials.gov for its current status, or see similar studies below.

This study is testing a yellow fever vaccine in healthy adults aged 18-50 to see if it is safe and effective for people who are at risk but can't get vaccinated.

Quick facts

Study typeInterventional
Ages18 Years to 50 Years
SexAll
Enrollment30 (estimated)
SponsorLeiden University Medical Center
Academic / other
Locations1 site (Leiden)
Trial IDNCT05901454 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are healthy adults aged 18-50 years who are at risk of yellow fever infection.

Probably not a fit

Patients with contraindications to the YF-17D vaccine, such as immune deficiencies or previous vaccinations, will not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study investigates the safety and efficacy of the YF-17D yellow fever vaccine in healthy adults aged 18-50 years. It aims to address the lack of antiviral treatments for yellow fever, focusing on individuals who are at risk but cannot be vaccinated due to contraindications. The study will involve administering the vaccine and monitoring participants for any adverse effects or immune responses. The ultimate goal is to develop effective treatment options for those unprotected against yellow fever infection.

Why it matters

Potential benefit: If successful, this study could lead to life-saving treatment options for individuals at risk of yellow fever who cannot be vaccinated.

How similar studies have gone: Other studies have explored yellow fever vaccination and its effects, but this specific approach to treatment in unvaccinated individuals is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* age 18-50 years

Exclusion Criteria:

* contraindication to receive YF-17D (immune deficiency, thymus illness)
* previous YF vaccination
* pregnancy
* chicken egg allergy
* hypersensitivity to any other substance in the YF-17D vaccine
* interval of \< 4 weeks of another live attenuated vaccine

Where it's running

  • Leiden University Medical Center
    Leiden, Netherlands
    Recruiting

Study contacts

  • Principal investigator: Anna HE Roukens, MD PhD — Leiden University Medical Center
  • Study coordinator: Anna H Roukens, MD, PhD
  • Email: a.h.e.roukens@lumc.nl
  • Phone: +31715262613

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.