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Diarrhea is a condition characterized by increased frequency of bowel movements (BAB) of ≥3 times/day with a more liquid consistency. Diarrhea can be caused by infectious or non-infectious agents. Diarrhea can occur acutely, lasting less than 2 weeks, or chronically, lasting more than 2 weeks. The prevalence of diarrhea in toddlers is 12.3% and in infants is 10.6%.3 Based on data from the Medan City Health Office, the incidence of diarrhea in 2023 is estimated to be 66,802 cases across all ages and 32,324 cases in toddlers, with almost half of diarrhea sufferers being children. The Medan City Health Office reported the incidence of diarrhea in toddlers was 2,894 cases and adults 14,112 cases, or approximately 20.5%. Parents are one of the closest people and act as caregivers for children, so they have a crucial role in controlling diarrhea in children, including early management and prevention. Good parental knowledge, attitudes, and behavior regarding the management and prevention of diarrhea can reduce diarrhea morbidity and mortality in children.

Background: Compliance with routine infant immunization is essential for the success of vaccination programs and the prevention of vaccine-preventable diseases. However, adherence to immunization schedules remains suboptimal due to limited parental knowledge, concerns about vaccine safety, and the limited effectiveness of conventional health education. Audio-visual media offer a promising solution by delivering information in a more engaging, clear, and consistent manner. Objective: This study aimed to evaluate the effectiveness of audio-visual educational media in improving adherence to basic immunization among infants in the service area of the Rum Balibunga Community Health Center. Methods: A quasi-experimental design with a one-group pretest-posttest approach was used. The sample included 40 mothers with infants aged 0-12 months selected through purposive sampling. Participants received an educational video on basic immunization. Adherence was assessed before and after the intervention based on completeness and timeliness according to the national schedule. Data were analyzed using univariate and bivariate methods, with the McNemar test for paired categorical data. Results: There was a significant improvement in immunization adherence after the intervention. Statistical analysis confirmed a meaningful difference before and after exposure, indicating the effectiveness of audio-visual media. Conclusion: Audio-visual education is an effective strategy to improve infant immunization adherence and can be widely applied in primary healthcare settings.