From the Department of Epidemiology at Johns Hopkins University and continuing in the tradition of award-winning educator and epidemiologist Dr. Leon Gordis, comes the fully revised 6th Edition ofGordis Epidemiology. This bestselling text providesa solid introduction to basic epidemiologic principlesas well aspractical applicationsin public health and clinical practice, highlighted by real-world examples throughout. New coverage includesexpanded information on genetic epidemiology, epidemiology and public policy,andethical and professional issues in epidemiology,providing a strong basis for understanding the role and importance of epidemiology in today's data-driven society.