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Clinical Trial Summary

This is a Multicenter, observer-blinded, randomized, Active controlled, Phase 3 study in healthy 6 months to 45 years aged Nepalese at the time of the first vaccine dose.

The study objectives are:

I. Demonstrate non-inferiority of Vi-DT compared to Typbar TCV® as measured by seroconversion rates of anti-Vi IgG ELISA antibody titers, 4 weeks after single dose (pooled immunogenicity of three lots of Vi-DT)

II. Demonstrate the equivalence of immunogenicity as measured by anti-Vi IgG GMT of three lots of Vi-DT vaccine 4 weeks after single dose.


Clinical Trial Description

Subjects will be stratified according to age. The study procedure is as follows:

Visit 1 (day-1 to -7): Screen participants by medical/medications history, physical examination, Vital signs, Urine pregnancy test (UPT)

Visit 2 (day 0): Enroll, randomize and administer vaccine to eligible participants and assess participant safety by physical examination and Vital signs, Collect blood for immunogenicity assessments.

Visit 3 (day 7): Check solicited adverse reaction 7 days post vaccination and Assess participant safety by physical examination and Vital signs

Visit 4 (day 28): Assess participant safety by physical examination and Vital signs, Collect blood for immunogenicity assessments

Visit 5 (day 84): Assess participant safety by physical examination and Vital signs

Visit 6 (day 168): Assess participant safety by physical examination and Vital signs, Collect blood for immunogenicity assessments, and fill in study completion form in the absence of any safety concern.

This study is observer-blind: vaccine administrator and vaccine safety evaluator will be two distinct persons to avoid bias of safety assessment. Trial staff other than the vaccine administrator.

For retention: After vaccination, field health worker/designee will contact participant every day till Day 7 by physical visit or by phone call. Follow-up reminder calls will be done very frequently as per discretion of study staff until 24 weeks for all participant to assess participant safety. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT03933098
Study type Interventional
Source International Vaccine Institute
Contact
Status Active, not recruiting
Phase Phase 3
Start date November 15, 2019
Completion date January 2021

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