Epidemiology is integral to public health. This book introduces the principles, methods and application of epidemiology for improving health and survival. It is designed for self-directed learning by students and all who work in public health and health-related areas, including health economists, health policy analysts, and health services managers. Using this book will help you to practice the application of basic epidemiological methods to measure health outcomes, identify risk factors for a negative outcome, and evaluate health interventions and health services. The book helps to distinguish between strong and poor epidemiological evidence, an ability that is fundamental to promoting evidence-based health care.This 3rd edition has been revised to include: A new section on the historical development of epidemiology New infographics and figures to help visualise concepts Contemporary health issues explored through examples and exercises More activities for self-testing A new final integrating chapter with real-life examples, such as the Zika outbreak, linking research to implementationIntroduction to Epidemiology 3rd edition is an essential resource on a fascinating area that is crucial to an understanding of public health.Series Editors: Rosalind Plowman and Nicki Thorogood.