Under-immunization rates for childhood immunizations in the United States range from 8-20%. Previous studies have demonstrated that pediatric patients are most likely to be under-immunized for seasonal immunizations. The aim of this study is to explore the factors and facilitators contributing to measles immunization hesitancy. A secondary aim is to explore the impact of hypothetical contexts on measles immunization hesitancy. The results of this study may identify potential disparities in measles immunization coverage and potential solutions for addressing those disparities.