Complete vaccination, or the delivery of all doses in a vaccine schedule, is one of the most cost-effective treatments for reducing death and morbidity in children under the age of five. Only a few research, however, have looked at the extent and determinants of incomplete vaccination. The purpose of this study was to determine the variables related with inadequate immunisation in children aged 12–23 months in Kutaber District, South Wollo Zone, Ethiopia. A community-based cross-sectional research was undertaken in Kutaber District. The stratified multi-stage sampling approach was used to choose 480 individuals. The data was gathered using a standardised, pre-tested, and interviewer-administered questionnaire. To identify variables associated with partial vaccination, a logistic regression model was constructed. In this cohort, the rate of incomplete vaccination was determined to be 7.7 percent. Home delivery, children from mothers with no Tetanus Toxoid (TT) vaccination history, living near the health post, caregivers aged 19–26 years, mothers/caregivers with no education, and children from mothers with no Antenatal Care (ANC) follow-ups were found to be significantly associated with incomplete vaccination.

According to the Ethiopian national report, the percentage of incomplete immunisation was low. Incomplete immunisation was strongly related with mother/caregiver educational status, TT vaccination of mother, ANC follow-ups, site of delivery, and residing near health services. In light of these findings, the Ethiopian zonal health office and health care providers should improve maternal health services in order to reduce the rate of noncompliance with full immunisation.