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Impact of Electronic Immunization Tracking on Childhood Immunization Completion in Nigerian Primary Healthcare Centres

Abstract

Childhood immunization is one of the most effective public health interventions for preventing vaccine-preventable diseases and reducing childhood morbidity and mortality. Despite the importance of routine immunization, completion of recommended childhood vaccination schedules remains a challenge in some parts of Nigeria due to missed appointments, limited caregiver awareness, inaccurate or incomplete records, vaccine stock-outs, mobility of families, geographical barriers, and weak follow-up systems. Electronic immunization tracking provides an opportunity to strengthen the identification and monitoring of children due or overdue for vaccination through digital registration, electronic vaccination records, automated reminders, appointment tracking, defaulter identification, and real-time monitoring of immunization status. Effective use of electronic tracking systems may improve the continuity of vaccination services and increase the proportion of children who complete their recommended immunization schedules. Against this background, this study investigates the impact of electronic immunization tracking on childhood immunization completion in Nigerian primary healthcare centres. The study will be anchored on the Health Belief Model, Technology Acceptance Model, and Donabedian Model of Healthcare Quality. The Health Belief Model explains how caregivers' perceptions of vaccine-preventable diseases, perceived benefits of immunization, perceived barriers, and cues to action may influence adherence to childhood vaccination schedules. The Technology Acceptance Model explains how perceived usefulness, perceived ease of use, and acceptance of electronic immunization tracking technologies may influence their adoption and effective utilization by healthcare workers. The Donabedian Model explains healthcare quality through structure, process, and outcome, with electronic immunization tracking representing an important service-delivery and information-management process and childhood immunization completion serving as a measurable outcome. Collectively, these theoretical perspectives provide a suitable framework for explaining how electronic immunization tracking may influence childhood immunization completion in Nigerian primary healthcare centres. The study will adopt a quantitative quasi-experimental or analytical comparative research design. The study population will comprise children eligible for routine childhood immunization and their mothers or primary caregivers attending selected primary healthcare centres in Nigeria, as well as healthcare workers responsible for immunization services. A multistage sampling technique will be used to select states, local government areas, communities, primary healthcare centres, eligible children, caregivers, and healthcare workers. Electronic immunization tracking will be assessed using indicators such as availability of electronic immunization records, digital child registration, vaccination appointment tracking, automated reminders, identification of children who are due or overdue for vaccination, electronic defaulter tracking, record updating, data completeness, healthcare worker utilization of the system, system accessibility, technical support, data security, and monitoring of immunization performance. Childhood immunization completion will be assessed using indicators such as receipt of all age-appropriate routine vaccine doses within the recommended schedule, timely vaccination, completion of vaccination milestones, missed appointments, delayed doses, dropout between vaccination visits, availability of complete vaccination records, and proportion of children classified as fully immunized according to the applicable national schedule. Data will be collected using structured questionnaires, electronic immunization records, immunization registers, child health cards, vaccination registers, appointment records, defaulter-tracking records, healthcare worker interviews, and primary healthcare facility monitoring documents. Descriptive statistics will be used to summarize caregivers' and children's characteristics, electronic tracking implementation, vaccination attendance, and immunization completion patterns. Inferential statistical techniques, including chi-square tests, t-tests, correlation analysis, and logistic or multiple regression analysis where appropriate, will be used to determine the impact of electronic immunization tracking on childhood immunization completion. Where a quasi-experimental design is adopted, immunization completion before and after implementation of electronic tracking may be compared, or completion among children managed through electronic tracking may be compared with children receiving conventional paper-based tracking. Diagnostic tests will also be conducted to assess the reliability, validity, and robustness of the findings. The study is expected to find that electronic immunization tracking has a significant positive impact on childhood immunization completion in Nigerian primary healthcare centres. Children whose vaccination schedules are monitored through electronic tracking systems are expected to have a higher likelihood of completing recommended immunization schedules and receiving vaccines on time than children followed through conventional record-keeping and follow-up systems. Automated reminders may help caregivers remember vaccination appointments, while electronic identification of overdue children may enable healthcare workers to conduct timely follow-up and defaulter tracing. Improved record completeness and accessibility may also reduce lost or incomplete immunization records and strengthen continuity of care when children move between healthcare facilities. However, poor internet connectivity, inadequate electricity supply, insufficient digital infrastructure, healthcare worker shortages, limited staff training, system downtime, data-entry errors, privacy concerns, and inadequate technical support may limit the effectiveness of electronic tracking systems. The study therefore expects accessible, user-friendly, adequately supported, and properly integrated electronic immunization tracking systems to contribute significantly to improved childhood immunization completion in Nigerian primary healthcare centres. The study is expected to contribute to the literature on electronic immunization tracking, childhood immunization completion, digital health, routine immunization, immunization information systems, primary healthcare, vaccine uptake, defaulter tracking, and public health in Nigeria. The findings will provide useful information to the Federal Ministry of Health and Social Welfare, National Primary Health Care Development Agency, National Primary Health Care Development Agency's immunization programmes, state ministries of health, primary healthcare centres, healthcare workers, digital health programme managers, development partners, and policymakers regarding strategies for strengthening routine childhood immunization. The study will also provide evidence-based recommendations for expanding electronic immunization tracking, improving digital infrastructure at primary healthcare centres, strengthening healthcare worker training, integrating electronic tracking with routine immunization information systems, improving automated reminder and defaulter-tracking functions, ensuring reliable electricity and connectivity, strengthening data quality and security, and providing continuous technical support to improve childhood immunization completion across Nigeria.

Keywords: Electronic immunization tracking, childhood immunization completion, routine immunization, digital health, immunization information systems, vaccine uptake, defaulter tracking, primary healthcare centres, child health, Nigeria, public health.