14 introduction to preventive medicine chapter outline i basic concepts a health defined b health as successful adaptation c health as satisfactory functioning ii measures of health status iii natural history of disease iv levels of prevention a primary prevention and predisease stage 1 health promotion 2 specific protection b secondary prevention and latent disease c tertiary . Preventive medicine based on the principle of prevention first is a science of study on the relationship between the external environment and human health is a complete. Full text full text is available as a scanned copy of the original print version get a printable copy pdf file of the complete article 141k or click on a page image below to browse page by page. Introduction to preventive medicine october 18 2002 john gazewood md msph objectives after this lecture you should be able to define and calculate prevalence define and calculate incidence define and give examples of risk factors know how risk factors are used