Dose-ranging Study of an Investigational Yellow Fever Candidate Vaccine in Adults

Inclusion criteria : * Aged 18 years up to 60 years on the day of inclusion * Able to read and understand the Informed Consent Form which has been signed and dated * Able to attend all scheduled visits and to comply with all trial procedures Exclusion criteria: * Participant is pregnant, or lactating, or of childbearing potential and not using an effective method of contraception or abstinence from at least 4 weeks prior to vaccination until at least 4 weeks after vaccination. To be considered of non-childbearing potential, a female must be pre-menarche , or post-menopausal for at least 1 year, or surgically sterile * Participation at the time of study enrollment (or in the 4 weeks preceding the trial vaccination) or planned participation during the present trial period in another clinical trial investigating a vaccine, drug, medical device, or medical procedure * Receipt of any vaccine in the 4 weeks preceding the trial vaccination or planned receipt of any vaccine in the 4 weeks following the trial vaccination * Previous vaccination against a flavivirus disease including YF with either the trial vaccine or another vaccine * Receipt of immune globulins, blood, or blood-derived products in the past 6 months * Known or suspected congenital or acquired immunodeficiency; or receipt of immunosuppressive therapy, such as anti-cancer chemotherapy, or radiation therapy, within the preceding 6 months; or long-term systemic corticosteroid therapy (prednisone or equivalent for more …