Depending on the context, we reach vulnerable populations through the appropriate manner and use key determinants and evidence-based information to determine the best outlet. In 30 countries across Asia, Africa, and the Caribbean, Population Services International (PSI) promotes healthy behaviors by educating individuals about purifying drinking water in the home, practicing improved hygiene and off ering treatment for diarrheal disease if a child falls ill. PSI’s programs ensure thatfamilies have the tools to maintain the health of their children. PSI combines education to motivate healthy behavior with the provision of needed health products and services , which are attractively packaged and marketed in the local context. Local knowledge, attitudes and practices are integrated into the communications messages through ongoing behavioral research. Different channels: Retail: Products are typically sold in pharmacies, grocery stores, and kiosiks at affordable prices. Community-based distribution through local NGOs, CHWs, and women’s groups Building on Public Sector : Working with clinics, schools, etc.