Efficacy and Safety of Dengue Vaccine in Healthy Children

Inclusion Criteria : * Aged 4 to 11 years on the day of inclusion. * Participant in good health, based on medical history and physical examination. * Provision of assent form signed by the participants (for participants \>= 7 years old) and informed consent form signed by the parent or another legally acceptable representative. * Participant and parent/ legally acceptable representative able to attend all scheduled visits and to comply with all trial procedures. * Participant attended one of the schools involved in the trial and living in the Ratchaburi Province. * For a female participant of child-bearing potential (girls post-menarche), avoid becoming pregnant (use of an effective method of contraception or abstinence) for at least 4 weeks prior to first vaccination, until at least 4 weeks after the last vaccination. Exclusion Criteria : * Febrile illness (temperature \>= 37.5°C) or moderate or severe acute illness/infection on the day of vaccination, according to Investigator judgment. * For a female participant of child-bearing potential (girls post-menarche), known pregnancy or positive urine pregnancy test on the day of the first trial vaccination. * Personal or family history of thymic pathology (thymoma), thymectomy, or myasthenia. * Planned participation in another clinical trial during the present trial period. * Known or suspected congenital or acquired immunodeficiency, immunosuppressive therapy such as anti-cancer chemotherapy or radiation therapy, or long-ter…