Fig. 1From: Designing an SMS reminder intervention to improve vaccination uptake in Northern Nigeria: a qualitative studyAdaptation of the health belief model and theory of planned behavior to explain vaccine uptake. We adopted these theoretical models from the concepts of the Health Belief Model and Theory of Planned Behavior. These models show that beliefs and perceptions can influence attitudes towards vaccination, which leads to an assessment of behaviors and influences behavioral intentions to vaccinate by ultimately visiting a health center. Elements highlighted in yellow represent the pathways of interest in the IRISS studyBack to article page