Immunogenicity of Japanese Encephalitis Vaccine Co-administered With Measles-Mumps-Rubella Vaccine (MMR)

Inclusion Criteria: * Participants aged 8 months to \<12 months at the time of enrollment * Participants are able to provide valid identification documents of themselves and/or their legal guardian (entrusted person). * Legal guardian of the participants can understand requirements and processes of the study, voluntarily agree to participate in the clinical trial, provide informed consent, accept all scheduled visits. Exclusion Criteria: * Axillary temperature \>37.0 ℃ at the time of enrollment. * Participating in another clinical trial or planning to participate in another clinical trial during the course of this trial. * Previous receipt of the Japanese encephalitis vaccine or the measles-mumps-rubella vaccine (or a vaccine containing any of these components), or plan to receive other vaccines of the same type or composition during the trial period. * History of measles, mumps, rubella, or Japanese encephalitis infection (confirmed by clinical, serological, or microbiological methods). * Received blood or blood products within 3 months before enrollment. * History of allergies to any component of the experimental vaccine, or severe allergies to other vaccine or drugs administered in the past, such as anaphylactic shock, laryngeal edema, henoch-schonlein purpura, thrombocytopenic purpura, arthur reaction, dyspnea, angioneuroedema, systemic rash and/or urticaria. * History of attenuated live vaccine administration within 14 days prior to vaccination, or history of other no…