Introduction to Epidemiology, Fourth Edition is the ideal introductory text for the epidemiology student with minimal training in the biomedical sciences and statistics. With greater emphasis on acute and chronic noninfectious diseases than ever before, the new edition captures the evolution of the discipline, featuring: Descriptive and analytic research designs used in epidemiology. New case studies and news files representing applications of commonly used research designs. Learning objectives, as well as study questions with descriptive answers, in each chapter. Detailed tables and figures that summarize and clarify important concepts and information. In addition to students of epidemiology, this text is a valuable reference for epidemiologists working in the field, industrial hygienists, infectious disease nurses, and staff epidemiologists. The book also features helpful instructor resources, including an Instructor's Manual, Testbank and PowerPointsTM. Table of Contents Chapter 1 Foundations of Epidemiology Objectives 1 Activities in Epidemiology Role of Epidemiology in Public Health Practice Epidemics, Endemics, and Pandemics Case Concepts in Epidemiology The Epidemiology Triangle Some Disease Transmission Concepts Modes of Disease Transmission. Chain of Infection Advanced Triangle of Epidemiology Levels of Prevention Chapter 2 Historic Developments in Epidemiology Hippocrates, the First Epidemiologist Disease Observations of Sydenham