A Controlled Study of the Immunogenicity and Safety of Japanese Encephalitis Chimeric Virus Vaccine (JE-CV) in Comparison With SA14-14-2 Vaccine in Infants and Toddlers in Thailand
Overview
- Phase
- Phase 3
- Intervention
- Not specified
- Conditions
- Encephalitis
- Sponsor
- Sanofi Pasteur, a Sanofi Company
- Enrollment
- 300
- Primary Endpoint
- Number of Participants With Japanese Encephalitis Seroconversion After Vaccination With One Dose of Either Japanese Encephalitis Chimeric Vaccine (JE-CV) or Japanese Encephalitis Live Vaccine (SA14-14-2) (CD.JEVAX®)
- Status
- Completed
- Last Updated
- 12 years ago
Overview
Brief Summary
The purpose of this study is to compare a single dose of Japanese encephalitis (JE) chimeric virus vaccine (JE-CV) with a single dose of SA14-14-2 live vaccine as primary vaccination in infants and toddlers.
Primary Objective:
- To demonstrate the non-inferiority of the antibody response 28 days after vaccine administration of one dose of JE CV (administered on Day 0) compared to the antibody response after one dose of the SA14-14-2 control vaccine (administered on Day 0).
Secondary Objectives:
- To describe the immune response to JE in both vaccine groups in JE-CV virus and SA14-14-2 virus before and after a single dose of JE CV or a single dose of SA14-14-2 vaccine
- To describe the safety profile in all vaccinated subjects up to 28 days and all serious adverse events (SAEs) up to 6 months after vaccination.
- To describe only related SAEs and all death from 6 month to 12-month follow-up.
Detailed Description
All participants will receive one injection of their randomized vaccine on Day 0. Follow-up will continue for 12 months after vaccination.
Investigators
Eligibility Criteria
Inclusion Criteria
- Not provided
Exclusion Criteria
- Not provided
Outcomes
Primary Outcomes
Number of Participants With Japanese Encephalitis Seroconversion After Vaccination With One Dose of Either Japanese Encephalitis Chimeric Vaccine (JE-CV) or Japanese Encephalitis Live Vaccine (SA14-14-2) (CD.JEVAX®)
Time Frame: Day 0 through Day 28 after vaccination
Immunogenicity was assessed by the JE-CV virus and the SA14-14-2 virus 50% plaque reduction neutralization test (PRNT50). Japanese Encephalitis seroconversion was defined as a pre-vaccination titer \<10 1/dil and post-vaccination titer ≥ 10 1/dil; or a pre-vaccination titer ≥ 10 1/dil and a 4-fold increase from pre- to post-vaccination.
Secondary Outcomes
- Number of Participants With Japanese Encephalitis Seroprotection 28 Days After Vaccination With One Dose of Either Japanese Encephalitis Chimeric Virus Vaccine (JE-CV) or Japanese Encephalitis Live Vaccine (SA14-14-2, CD.JEVAX®)(Day 28 post-vaccination)
- Number of Participants With Seroconversion After Vaccination With Either Japanese Encephalitis Chimeric Virus Vaccine (JE-CV) or Japanese Encephalitis Live Vaccine (SA14-14-2) (CD.JEVAX®)(Day 28 post-vaccination)
- Summary of Geometric Mean Titers of Vaccine Antibodies Before and Following One Dose of Vaccination With Either Japanese Encephalitis Chimeric Virus Vaccine (JE-CV) or Japanese Encephalitis Live Vaccine (SA14-14-2; CD.JEVAX®)(Day 0 (pre-vaccination) and up to 12 months post-vaccination)
- Summary of Participants With Japanese Encephalitis Seroprotection After Vaccination With One Dose of Either Japanese Encephalitis Chimeric Virus Vaccine (JE-CV) or Japanese Encephalitis Live Vaccine (SA14-14-2, CD.JEVAX®)(Day 28 up to 12 months post-vaccination)
- Number of Participants Reporting a Solicited Injection Site or Systemic Reaction Following Vaccination With One Dose of Either Japanese Encephalitis Chimeric Virus Vaccine (JE-CV) or Japanese Encephalitis Live Vaccine (SA14-14-2 Vaccine) (CD.JEVAX®)(Day 0 through Day 14 post-vaccination)