This comprehensive reference uses an ecological perspective to sort out the complex mix of biological, psychological, social, and other factors influencing adolescent health as well as shaping professional responses to the needs of adolescents. Describing critical concerns at the global level and innovative strategies from selected countries, the book urges readers to develop and support practices and policies to enhance optimal youth development. Expert coverage centers on key areas: the global state of adolescent health and development, adolescent health issues and public health answers, making health systems more responsive to youth, and improving school health services. And bedrock themes such as social determinants of health, young people’s right to health care, and health and gender disparities are discussed throughout these chapters.