Epidemiology Terminologies, Study Methods, the Epidemiologic Triad, Levels of Prevention and the Types of Surveillance

Epidemiology lecture notes that start with the terminologies used in the discipline and the descriptive, analytic and experimental methods, then the natural history of disease through its stages of susceptibility, subclinical disease, clinical disease and recovery or disability. The objectives of epidemiology and the agent, environment and host triad lead into primary, secondary and tertiary prevention with their screening examples, and the surveillance section takes the information loops, the core and support functions, the sources of information and the active and passive types.