Public health is an interdisciplinary field that draws from fields such as epidemiology, biostatistics, social sciences, and management of health services. The primary aims of public health include preventing disease, prolonging life and promoting health. The objectives of public health can be achieved through organized efforts and choices made by society, public and private organizations, communities, and individuals. The study of public health also involves the role of environmental health, community health, behavioral health, health economics, public policy, mental health, health education, health politics, occupational safety, disability, oral health, and reproductive health. The pivotal role of public health is to inform, educate, and empower people about the various health-related problems and their resolutions. This can be performed by assessing current services, ascertaining the requirements of health professionals, and supporting decision making in health care. This book is compiled in such a manner, that it will provide an in-depth knowledge about public health as well as the application of probability, statistics and modeling in this field. It is appropriate for those seeking detailed information in this area of study.