Background: The data reveal a consistent decrease in the overall immunization coverage for babies in Kota Pariaman over a span of four years. Specifically, the coverage rates were recorded as 81.8% in 2018, 78.6% in 2019, 55.7% in 2020, and 66.7% in 2021. Purpose: The aim of this study is to identify the factors that contribute to the decrease in the achievement of complete basic immunizatio…