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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.

Child health issues are one of the government's priorities in creating a quality generation. One effort for this purpose, all children under five are immunized. The challenge of implementing the immunization program that causes the target of immunization coverage not to be achieved is the lack of knowledge. In an effort to increase knowledge, the role of health workers, especially midwives, is to provide information through health education using both the demonstration method and the discovery learning method. This study aims to determine the effectiveness of the demonstration method and the discovery method on mother's knowledge about the completeness of basic immunization in infants at the UPTD Inpatient Health Center Warunggunung - Lebak Banten 2023. This study used a pre-experimental design with one group pretest-posttest design. One-group pre-post test design to obtain knowledge data before and after the intervention. The number of samples in this study were 66 mothers who had babies who met the inclusion criteria. The instrument used for data collection used a questionnaire and then the data were analyzed using a paired test and an independent sample T test. The results of the research produced in this study were that the mother's knowledge before the intervention was included as lacking and after being given the intervention with demonstration and discovery was sufficient. There is an influence of health education demonstration and discovery methods on mother's knowledge about completeness of basic immunization (p value 0.000). There is no difference in the effectiveness of the demonstration method and the discovery method on mother's knowledge about the completeness of basic immunization in infants with a p value of 0.068.