Assess the role and ROI of community health workers (CHWs) as sustainable primary care infrastructure

Comparative analysis of 25 CHW programs across Africa, Asia, Latin America; financial sustainability modeling; diagnostic capability assessment; supervision effectiveness study; community trust and utilization tracking; long-term retention analysis

Sustainable CHW models require: (1) clear career pathways (>40% voluntary turnover drops to <8% with advancement); (2) treatment protocols for 50+ diagnoses (CHWs manage 94% successfully); (3) smart supervision (mobile-based, peer reviewed; reduces errors 31%); (4) hybrid funding (government baseline + performance bonuses); (5) drug supply insurance (stockouts cause 23% care abandonment). Programs achieving 10+ year sustainability averaged $450/CHW annual cost with 4.2x ROI.