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Effectiveness of a Typhoid Conjugate Vaccine in DRC — TyVECO  

Typhoid Fever Clinical Trial

Official title:
An Open-label Effectiveness Study of a Typhoid Conjugate Vaccine in Kisantu, Democratic Republic of Congo (TyVECO) - Step 2: Typhoid Conjugate Vaccine (TCV) Mass-vaccination Campaign

Clinical Trial Summary

This is a prospective cohort evaluation of vaccine effectiveness of a single dose of Typbar-TCV® against symptomatic blood culture-confirmed typhoid fever when administered through a mass vaccination campaign to children 9 months to <16 years of age in Kisantu, DRC.

Clinical Trial Description

This study is conducted in Kisantu, DRC and is comprised of a mass vaccination campaign of children aged 9 months to <16 years with a single dose of Typbar-TCV® and a concomitant surveillance study to assess the incidence of culture-confirmed typhoid fever in the population during a period of three years following vaccination. Safety events will be monitored for 30 minutes following vaccination for all participants. In a subset of age-eligible participants living in the study area, the investigators will assess local and systemic solicited adverse events/adverse reactions and unsolicited adverse events occurring within the first 7 days post-vaccination and unsolicited and serious adverse events within 28 days post-vaccination. A population census will be conducted at baseline to enumerate and characterize the population under study and demographic information will be collected to allow for minimization of potential sources of bias during analysis. An interim censuses and a census at study closure will be carried out to update population information. The investigators hypothesize that the Typbar-TCV® vaccine is effective in large scale vaccination campaigns, thereby lowering the incidence of blood-culture confirmed typhoid fever in children. Lessons and experiences on vaccination feasibility and uptake will be important for informing TCV introduction across the African continent. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT05119426
Study type Interventional
Source International Vaccine Institute
Contact Justin Im, MSc
Phone +82-10-3296-0711
Email justin.im@ivi.int
Status Recruiting
Phase Phase 4
Start date February 11, 2022
Completion date December 2024
View Details
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