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Level of immunity and safety of two types of vaccines administered for the prevention of Japanese encephalitis in an interchangeable dosing schedule among healthy Indian children: A multi-centric study

Immunogenicity and safety of JENVAC and JEEV vaccines administered for prevention of Japanese encephalitis in an interchangeable dosing schedule among healthy Indian children: A multicentric, phase IV, open-labeled, randomized controlled trial - Nil

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
CTRI
Registry ID
CTRI/2023/07/055155
Enrollment
900
Registered
2023-07-13
Start date
Unknown
Completion date
Unknown
Last updated
2023-07-25

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Interventions

Intervention1: JENVAC/JEEV: first dose (9 to 12 months) JENVAC 0.5ml intramuscular second dose (16-24 months) JEEV 0.5 ml intramuscular Intervention2: JEEV/JENVAC: first dose (9 to 12 months) JEEV 0.5

Sponsors

Indian Council of Medical Research
Lead Sponsor

Eligibility

Inclusion criteria

Inclusion criteria: A child will be included in the study if all of the following criteria are fulfilled: 1.Healthy, as established by medical history and clinical examination by a pediatrician. 2.Age between 9-12 months at the time of enrolment. 3.Parental ability and willingness to provide informed consent. 4.Parents (or legal guardian) who have been residents of the study area for atleast the past 6 months and intend to remain in the area with the child during the study period.

Exclusion criteria

Exclusion criteria: Any of the following conditions will exclude children from the study: 1.Presence of febrile illness in the previous 72 hours or on the day of enrolment (temporary exclusion). 2.Acute disease at the time of enrolment (temporary exclusion). 3.Concurrent participation in another clinical trial throughout the entire timeframe for this study. 4.History of severe hypersensitivity reaction to injections including other vaccines received in past 5.Presence of significant malnutrition (weight-for-height z-score 6.Any systemic disorder (cardiovascular, pulmonary, hepatic, renal, gastrointestinal, haematological, endocrine, immunological, dermatological, neurological, cancer or autoimmune disease), congenital or acquired, as determined by medical history and/or physical examination. 7.Acute infectious disease, active tuberculosis; otitis media 8.History of epilepsy and any diagnosed neurological disorder 9.Known or suspected impairment of immunological function based on medical history and physical exam. 10.Prior receipt of JE vaccine. 11.Receipt of any immunoglobulin therapy and/or blood products since birth. 12.H/O chronic administration ( >14 days) of immunosuppressants including corticosteroids. 13.Any medical condition in the parents/infant which, in the judgment of the investigator, would interfere with or serves as a contraindication to protocol adherence or a participantâ??s parentsâ?? ability to give informed consent.

Design outcomes

Primary

MeasureTime frame
Sero-protection: PRNT50 titer of 1:10 will be considered as seropositive Seroconversion: PRNT50 Titer of 1:10 if the baseline titer was 10 or a 4-fold increase if the baseline titer was 10. Sero-protection: PRNT50 titer of 1:10 will be considered as seropositive Seroconversion: PRNT50 Titer of 1:10 if the baseline titer was 10 or a 4-fold increase if the baseline titer was 10Timepoint: 28 days after the second dose of JE vaccine

Secondary

MeasureTime frame
Immediate post-vaccination reactogenicity Solicited post-vaccination reactions Unsolicited vaccine-related AEs SAEs through out the study periodTimepoint: 1. within 30 min post-vaccination) 2. Post-vaccination reactions (until 7 days) 3. Occurrence of unsolicited adverse events until 28 days after each vaccine dose, 4. Vaccine-related serious adverse events (SAEs), at any time through the end of the study.

Countries

India

Contacts

Public ContactDr Manoj Murhekar

ICMR - National Institute of Epidemiology

mmurhekar@gmail.com04426136204

Outcome results

None listed

Source: CTRI (via WHO ICTRP) · Data processed: Feb 4, 2026