Restricted to public health majors. Introduction to basic principles and concepts in epidemiology, including descriptive epidemiology, association and causation, basic epidemiological study design, evidence-based decision analysis, and applications of epidemiology methods to basic and clinical science. Three lecture hours a week for one semester. Prerequisite: Public Health 317 with a grade of at least C-; and credit with a grade of at least C- or registration for Biology 325 or 325H, and Statistics and Data Sciences 320E or 320H (or credit for Statistics and Data Sciences 328M).