Epidemiology
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IUPAC Definition
International Union of Pure and Applied Chemistry (Chemistry and Human Health Division) Glossary of Terms Used in Toxicology (Second Edition) defines Epidemiology as the:
Study of the distribution and determinants of health-related states or events in specified populations and the application of this study to control of health problems.
USDA Definition
The U.S. Department of Agriculture's Food Safety and Inspection Service (FSIS) defines Epidemiology as:
The study of the distribution of disease, or other health-related conditions and events in human or animal populations, in order to identify health problems and possible causes.
EPA Definition
The U.S. Environmental Protection Agency (EPA) defines Epidemiology as:
The study of the distribution of disease, or other health-related states and events in human populations, as related to age, sex, occupation, ethnicity, and economic status in order to identify and alleviate health problems and promote better health.




