The impact of the PLASI App on DPT and polio immunization visits for children 0–9 months
Abstract
Background: The World Health Organization (WHO), through the Immunization Agenda 2030, promotes digital innovation to improve vaccine coverage. Digital health interventions can enhance access to information and community participation, although disparities in technology access remain a challenge.
Objective: To determine the effect of the PLASI application (Immunization Information Service Provider) on visits for Diphtheria, Pertussis, Tetanus, and Polio immunizations in children.
Methods: PLASI, a digital application delivering immunization information through audio, visuals, and graphics, was evaluated using a quasi-experimental pretest–posttest control group design. The study involved 135 mothers with infants aged 0–9 months attending posyandu in Klari Village, Karawang (January–May 2024). Using purposive sampling, 80 respondents were selected and divided into intervention (PLASI users) and control (non-users) groups. Instruments included the PLASI application, pretest–posttest questionnaires assessing maternal knowledge, and immunization visit observation sheets.
Results: McNemar test showed significant increases in DPT (p=0.020) and polio (p=0.020) immunization visits among PLASI users compared to the control group. However, limited technology access and sudden schedule changes were identified as barriers.
Conclusion: The PLASI application is effective in improving immunization visits by enhancing access to information and community participation. Nevertheless, addressing existing barriers such as limited technology access and service constraints is necessary through targeted health education, stakeholder collaboration, and periodic evaluation. Strengthening these aspects will support the sustainability and adaptability of digital health interventions, particularly in areas with limited infrastructure.
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