Epidemiology is the study of the distribution and determinants of health-related events in human populations, and the application of this study to control health problems. Measures of disease occurrence, such as the point prevalence of adult obesity in the United States, are central to the discipline. This is a study guide on measures of disease occurrence. The material presented includes concepts such as point prevalence, risk, and mortality rate. As stated on the front cover, inside you will find outlines, definitions of terms, formulas, graphic organizers, and self-assessments. The book is aimed at medical and public health students, public health practitioners, and researchers. Secondary audiences include academic instructors who may find this useful in their teaching.