Enrolling by Invitation

NCT Number: NCT07154836

Call for Life: Exploring mHealth Solutions for Enhancing Childhood Vaccinations Among Displaced Children in Conflict-affected Settings of Nigeria

This study evaluates the feasibility and preliminary impact of Call for Life, an mHealth platform aimed at increasing childhood vaccination coverage among internally displaced persons in Borno State, Nigeria. The platform uses an interactive voice response (IVR) system to deliver automated vaccination reminders, follow up on reported side effects, and provide health messages in English and local languages. A mixed-methods design is used to assess feasibility, interaction rates, and early effects on vaccine uptake. Findings will inform policymakers and humanitarian actors on the potential of mobile technology to strengthen immunization delivery in conflict-affected, resource-limited settings.

Enrolling by Invitation

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Key information

Conditions

Access to Immunization

Age range

23 month–23 month

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

El Miskin

Jere, Borno State, Nigeria

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

• Caregivers (male/female) of children from 0-23 months of age or pregnant women in third trimester

Caregivers above the age of 18 years of age
Caregivers who consent to participate in the study.
Resident in the IDP camp for at least one year

Exclusion criteria

• Pregnant women in third trimester in first pregnancy (primigravida)

Caregivers that are temporary residents of the IDP camps (IDPs on transit or visitors)
Caregivers without the mental capacity to comprehend the questions asked.
Inability to use or interact with a mobile phone ( e.g. those with hearing defects or poor vision)

Treatment and study plan

Telephone calls

Other

Regular telephone reminders and health information will be sent to help mothers or caregivers of children 0-23 months to remind them to go vaccine their children

Other names: Call4life

Primary outcomes

Number of zero-dose children aged 0-23 months vaccinated and registered in an immunization registry at the health facility

Time frame: 6 months

Number of zero-dose children aged 0-23 months vaccinated and registered in an immunization registry at the health facility. The immunization registry which will be used by the health facility to follow up with parents for the vaccination schedules of the children
Number of care givers to children aged 0-23 months who receive reminder calls from the call for life platform and take their children to the health facility for immunization

Time frame: 6 months

Number of care givers to children aged 0-23 months who receive reminder calls from the call for life platform and take their children to the health facility for immunization and registration into an immunization registry

Sponsors and collaborators

Lead sponsor

University of Cambridge

Other

Collaborators

Infectious Disease Institute at Makerere University
University of Maiduguri

Registry information

Acronym: Call 4 Life

Important dates

Study start: 2025
Primary completion: 2025
Study completion: 2025
First posted: Sep 4, 2025
Registry last updated: Sep 4, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.