NCT06331702

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

A Phase Ⅳ, Randomized, Controlled, Open-label, Immunogenicity Study of Vero Cell-derived Inactivated Japanese Encephalitis Vaccine (JEV-I) Co-administered With Measles-Mumps-Rubella Vaccine (MMR)

• Status: Completed
• Phase: Phase 4
• Study type: Interventional
• Enrollment: 408 (actual)
• Sponsor: Liaoning Chengda Biotechnology CO., LTD · Industry
• Sex: All
• Age: 8 Months – 12 Months
• Healthy volunteers: Accepted

Summary

This is a phase IV, randomized, controlled, open-label study proceed in healthy children aged 8 months in China. The primary objective is to demonstrate the immunogenicity of simultaneous administration of JEV-I and MMR is not inferior to that of separate administration, as measured by seroconversion rates and antibody titers against the four antigens. The secondary objective is to describe the safety of the vaccines when administered simultaneously or separately.

Detailed description

According to current immunization programs in China, there is an overlap in the vaccination schedules for JEV-I and MMR. Children are recommended to receive 2 doses of JEV-I at 8 months of age, with an interval of 7-10 days. The MMR vaccine is also recommended for administration at 8 months of age. Administering JEV-I and MMR vaccines simultaneously at 8 months of age may facilitate adherence to vaccination programs, reduce the burden of medical treatment for parents and children who receive both vaccines separately, and improve the efficiency of vaccination work. This is a phase IV, randomized, controlled, open-label study proceed in healthy children aged 8 months in China. The primary objective is to demonstrate the immunogenicity of simultaneous administration of JEV-I and MMR is not inferior to that of separate administration, as measured by seroconversion rates and antibody titers against the four antigens. The secondary objective is to describe the safety of the vaccines when administered simultaneously or separately. The children aged 8 months who have not received any Japanese encephalitis vaccine or MMR (or vaccines containing related ingredients) will be recruited and randomly assigned to one of three study groups (1:1:1 ratio): Group 1, Group 2 and Group 3. Participants in Group 1 will receive JEV-I (dose 1) and MMR simultaneously for the first time. Participants in Group 2 will receive JEV-I only. Participants in Group 3 will receive MMR only. Blood will be collected pre-vaccination (Day 0) and 30 days post vaccination to evaluate seroconversion rates and antibody titers against the four antigens. After each vaccination, all participants will be observed at the clinical site for at least 30 minutes for immediate reactions and will be monitored for solicited adverse events (AEs) for 7 days post vaccination. All participants will be monitored for unsolicited AEs and serious adverse events within 30 days of post vaccination.

Conditions

• Japanese Encephalitis
• Measles
• Mumps
• Rubella

Interventions

Type	Name	Description
BIOLOGICAL	Vero cell-drived inactive Japanese encephalitis vaccine	0.5ml for each dose, manufactured by Liaoning Chengda Biotechnology CO., LTD, administered in the deltoid area of lateral arm by intramuscular injection.
BIOLOGICAL	Measles-Mumps-Rubella Vaccine	0.5ml for each dose (after dissolving), manufactured by Shanghai Institute of Biological Products CO., LTD, administered in the lower part of the deltoid area of lateral arm, by subcutaneous injection.

Timeline

• Start date: 2024-03-02
• Primary completion: 2025-02-11
• Completion: 2025-02-11
• First posted: 2024-03-26
• Last updated: 2025-08-28

Locations

1 site across 1 country: China