Turnover of Antigen Specific Lymphocytes and Monocytes After Immunization With the 17D Yellow Fev… (NCT01290055) | Clinical Trial Compass
CompletedPhase 4
Turnover of Antigen Specific Lymphocytes and Monocytes After Immunization With the 17D Yellow Fever Vaccine
United States27 participantsStarted 2019-04-15
Plain-language summary
The yellow fever vaccine is a live, attenuated virus that results in a robust immune response, especially in the T cell compartment. The researchers have been studying immune responses to live viral infections using the yellow fever vaccine as a model for a live viral infection. In this study, the researchers are interested in looking at the processing and lifespan of yellow fever specific CD8 T cell by measuring DNA replication and cell proliferation in humans using a naturally occurring stable isotope called deuterium.
Who can participate
Age range
18 Years – 45 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion criteria
. Able to understand and give informed consent
. Age 18-45 years
. Participant agrees not to take any live vaccines 30 days before or after (14 days for inactivated, including coronavirus disease 2019 (COVID-19) vaccination) yellow fever vaccination (not applicable to Group 3 and 4b participants)
. Participant agrees to not receive any other vaccination during the 2H2O labeling period
. Women of child bearing potential must agree to use effective birth control for the entire duration of the study. A negative urine pregnancy test must be documented prior to vaccination or 2H2O intake. Participants who have a history of surgical sterilization or post-menopausal status \>1 year, are not required to have a pregnancy test.
. Positive for the HLA-A2 allele (not applicable to Group 3 or 4 participants)
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
. Prior receipt of a yellow fever vaccine (not applicable for Group 2 participants)
. Lived in a country/area which is endemic for yellow fever (not applicable to Group 2 participants)
. Travel to country/area which is endemic for yellow fever. Subject to investigator discretion
. History of previous West Nile, Dengue, St. Louis encephalitis, Japanese encephalitis vaccination or infection
. Any history of allergy to eggs, chicken or gelatin or to any previous vaccine (not applicable to Group 2 (if received YFV-17D outside of study), 3 and 4b participants)
. A history of a medical condition resulting in impaired immunity (such as HIV infection, cancer, particularly leukemia, lymphoma, use of immunosuppressive or antineoplastic drugs or X-ray treatment). Persons with previous skin cancers or cured non-lymphatic tumors are not excluded from the study.