The science and art related to the prevention of diseases, prolongation of life and promotion of human health with the help of organized efforts of the society, public and private organizations, communities and individuals is known as public health. The term, "health" is associated with physical, mental and social well-being. Public health is concerned with the analysis of a population's health and the threats related to it. Environmental health, health economics, community health, mental health, behavioral health, sexual and reproductive health, occupational safety, and health economics are some of the important sub-disciplines of public health. Promotion of handwashing, suicide prevention, delivery of vaccinations and distribution of condoms are some of the common public health initiatives. This book aims to shed light on some of the unexplored aspects of public health and the recent researches in this field. It strives to provide a fair idea about this discipline and to help develop a better understanding of the latest advances within this field. The extensive content of this book provides the readers with a thorough understanding of the subject.