Public health is concerned with the prevention of diseases and the promotion of human health through organized efforts of society, organizations, communities and individuals. Some of the common sub-branches of public health include environmental health, sexual and reproductive health, gender issues in health, community health, and mental health and occupational safety. Distribution of condoms, delivery of vaccinations and promotion of breastfeeding are some important preventive public health measures. The personnel involved in promoting public health mainly consist of public health nurses, epidemiologists, midwives, medical assistants and environmental health officers. This book is a compilation of chapters that discuss the most vital concepts and emerging trends in the field of public health. It explores all the important aspects of public health in the present day scenario. For all readers who are interested in this discipline, the case studies included in this book will serve as an excellent guide to develop a comprehensive understanding.