Epidemiology is built upon the premise that poor health outcomes are not randomly distributed in a population. By comparing the sick or injured to the well we can begin to identify the underlying causes of disease and injury. This course provides an epidemiologic approach to the study of incidence, prevalence, and patterns of disease and injury in populations and the application of this study to the control of public health problems. Students will describe the study designs used in epidemiology, learn to calculate basic epidemiologic measures, identify threats to study validity, identify public health surveillance and screening programs, and learn to draw appropriate inferences from epidemiologic data and reports. Lecture and laboratory. Prerequisites: Public Health 101 and one from Statistics 143, Psychology 255, or Sociology/Social Work 255.