| A | B |
| Epidemiology | The study of the distribution and determinants of health-related states in specific populations, and the application of this study to control health problems. |
| Descriptive epidemiology | Describing health events in terms of who, what where and when |
| Analytical epidemiology | Type of epidemiology that searches for causes and factors, the how and why |
| Applied (or Field) Epidemiology | Field of epidimiology where data steers public health decisions |
| Experimental Study | Study in which the epidimiologist has control over the circumstances |
| Observational Study | Study in which the scientist does not have control over the circumstances |
| Pandemic | Very widespread, often global disease |
| Endemic | A high background rate of disease |
| Cohort Study | A type of study in which the epidemiologist selects the study population according to exposure, whether they have the disease or not. |
| Cross-sectional study | A type of study in which the epidemiologist defines the population to be studied, then collects information from members of the group about members of the group about their disease and exposure status. |
| Relative Risk | In cohort studies, the measure that is used to determine association. |
| Relative risk of 4 | Means the person is 4 times more likely to become ill by engaging in the test behavior |