Our research project aims to address health inequity in cancer prevention by examining access to HPV vaccination among underserved populations in Texas. We will apply spatial accessibility measures, spatial modeling, and graph neural networks to assess geographic access to affordable HPV vaccination and utilization patterns. Additionally, we will conduct cognitive task analysis to understand how eligible families navigate access to free or low-cost HPV vaccines, informing the development of a user-centered navigation tool (HPVx Navigator: TxHPVx). By addressing the barriers to HPV vaccination and eventually improving access to VFC providers, we hope to contribute to a healthier future for all children in Texas.