Epidemiology is a scientific discipline concerned with the distribution and determinants of health and disease in populations. This course introduces the principles and core concepts of epidemiology to examine how we measure disease risk and design studies to shed light on the etiology of and risk factors for disease. This course will cover topics such as basic principles of epidemiology, measures of disease frequency, epidemiologic study designs, bias, confounding, screening, causality, and ethical issues in epidemiologic research.