Book excerpt: Over the past fifteen years, people in low- and middle-income countries have experienced a health revolution—one that has created new opportunities and brought new challenges. It is a revolution that keeps mothers and babies alive, helps children grow, and enables adults to thrive. Millions Saved: New Cases of Proven Success in Global Health chronicles the global health revolution from the ground up, showcasing twenty-two local, national, and regional health programs that have been part of this global change. The book profiles eighteen remarkable cases in which large-scale efforts to improve health in low- and middle-income countries succeeded, and four examples of promising interventions that fell short of their health targets when scaled-up in real world conditions. Each case demonstrates how much effort—and sometimes luck—is required to fight illness and sustain good health. The cases are grouped into four main categories, reflecting the diversity of strategies to improve population health in low-and middle-income countries: rolling out medicines and technologies; expanding access to health services; targeting cash transfers to improve health; and promoting population-wide behavior change to decrease risk. The programs covered also come from various regions around the world: seven from sub-Saharan Africa, six from Latin America and the Caribbean, five from East and Southeast Asia, and four from South Asia.