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Study identifier: NCT05859490 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

Immunogenicity of Yellow Fever Vaccine 17D in Adults With Prior 17D Vaccination

Condition: Yellow Fever · Immunization; Infection  ·  Sponsor: Oregon Health and Science University

PhasePhase 1/Phase 2
Planned participants35
Who can joinAll sexes, 20 Years to 49 Years
Healthy volunteersYes

About this study

The goal of this clinical trial is to assess the immune response to the yellow fever vaccine 17D in adults with prior 17D vaccination. The main questions this study aims to answer are: * how does prior vaccination affect antibody responses to re-vaccination? * how does prior vaccination affect the immune cell response to re-vaccination? Participants will: * have been previously vaccinated with 17D. * be re-vaccinated with 17D. * provide medical and travel histories. * provide a blood sample prior to vaccination * provide a blood sample approximately every other day for 14 days after vaccination. * provide a blood sample approximately 28 days after vaccination. * complete a daily diary of symptoms following vaccination for 14 days. * report any additional symptoms after 14 days.

This description comes directly from the study's public registry record.

Talk to the study team

William Messer, MD PhD  ·  503-494-2185  ·  messer@ohsu.edu

Sarah Siegel, PhD  ·  541-60-0798  ·  siegels@ohsu.edu

Always discuss trial participation with your own doctor first.

Locations (1)

Oregon Health & Science UniversityPortland, Oregon, United StatesRecruiting

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Source record: clinicaltrials.gov/study/NCT05859490