“…Physical proximity and access to health facility was highlighted as a key facilitator of polio vaccination [40,42]. Families that live far away from EPI centers often cited that this was one of their reasons for refusing immunization [25,30,31,35,36,42,45,47,48,52,54,67]. Constraints to caregivers time and schedules also acted as a barrier to vaccinating their children [25,28,30,32,35,42,45,47,48,54].…”