Timely vaccination plays a critical role in protecting individuals from life-threatening diseases by ensuring protection before age-specific peak incidences. It also helps maintain population-level immunity against vaccine-preventable infections (VPIs) and reduces the risk of large-scale outbreaks. However, despite its importance, scheduled vaccinations are sometimes missed. This can occur due to various factors, such as limited access to healthcare services, systemic barriers within the health system, missed opportunities by healthcare providers or caregivers, delays caused by a temporary contraindication, vaccine stock shortages, or prevalent misconceptions about VPIs and/or vaccination within communities.