Study of a Live Attenuated Japanese Encephalitis Chimeric Virus Vaccine (IMOJEV™) Compared to CD.JEVAX™ in Toddlers

Inclusion Criteria: * Aged 12 to 24 months on the day of inclusion * In good general health, without significant medical history. * Provision of informed consent form signed by at least one parent or other legally acceptable representative. * Subject and parent/guardian able to attend all scheduled visits and comply with all trial procedures. Exclusion Criteria: * Participation in another clinical trial investigating a vaccine, drug, medical device, or a medical procedure in the 4 weeks preceding the trial vaccination. * Planned participation in another clinical trial during the present trial period. * 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 corticosteroids therapy. * Known systemic hypersensitivity to any of IMOJEV™ components or history of a life-threatening reaction to a vaccine containing any of the same substances and vaccination,known systemic hypersensitivity to CD.JEVAX® main components and the other components (including Gelatin, kanamycin, and gentamicin). * Chronic illness at a stage that could interfere with trial conduct or completion, in the opinion of the Investigator. * Receipt of blood or blood-derived products in the past 3 months, that might interfere with the assessment of the immune response. * Previous vaccination against flavivirus disease, including Japanese encephalitis (JE). * Administration of any anti-viral within 2 months preceding Visit 01 and up to the 4 weeks following the trial vaccination. * Receipt of any vaccine in the 4 weeks preceding the first trial vaccination, except for pandemic influenza vaccination, which may be received at least two weeks before the study vaccines. * Planned receipt of any vaccine from the inclusion up to the 4 weeks following the trial vaccination. * History of central nervous system disorder or disease, including seizures. * Planned receipt of any JE vaccine during the course of the study. * History of flavivirus infection (confirmed either clinically, serologically or virologically). * Administration of systemic corticosteroids for more than two consecutive weeks within the 4 weeks preceding vaccination. * Febrile illness (temperature ≥38.0°C) or moderate or severe acute illness/infection 3 days before vaccination as well as the day of vaccination, according to Investigator judgment. * Thrombocytopenia or bleeding disorder contraindicated for vaccination with same administration route, or receipt of anticoagulants in the 3 weeks preceding inclusion.