Epidemiology is the study and analysis of the distribution, patterns and determinants of health and disease conditions in defined populations. It is the cornerstone of public health, and shapes policy decisions and evidence based practice by identifying risk factors for disease and targets for preventive healthcare. Epidemiologists help with study design, collection, and statistical analysis of data, amend interpretation and dissemination of results. Epidemiology has helped develop methodology used in clinical research, public health studies, and, to a lesser extent, basic research in the biological sciences.
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Public Health and Healthcare 