During the Q&A, Cambodia sought insights from Nepal on estimating out-of-school girls, who described combining education enrollment and census data adjusted at local government levels. Nepal also explained post-campaign monitoring using vaccination cards, rapid convenience surveys, and female community health volunteers for outreach. Bangladesh detailed its dual registration system (digital and manual) linked to birth records to track 10–14-year-old girls, addressing data gaps and vaccine leakage concerns by restricting routine doses to those exactly aged 10. China clarified its newly approved nine-valent vaccine is not yet WHO-prequalified and remains classified as a self-paid vaccine until future integration into national programs. The discussion underscored varied strategies for data validation, outreach, and future planning for routine HPV immunization across countries.