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An Introduction to Epidemiology for Health Professionals
Epidemiology is an old scientific discipline that dates back to the middle of the nineteenth century. It is a discipline that aims at identifying the determinants of diseases and health in populations. It uses a population approach like demography, perhaps the scientific discipline that most closely resembles epidemiology. Epidemiology is defined by the object of research, ?to identity determinants that change the occurence of health phenomena in human populations?.rnrnEpidemiology is often associated with infectious diseases because an epidemic of a disease originally refrred to an unexpected rise in the incidence of infectious diseases. Epidemiologic methods were first used to study diseases like cholera and measles. Now all diseases or health events are studied by means of epidemiologic methods and these methods that are constantly changing to meet these new needs. Even the term ?epidemic? is used to describe an unexpected increase in the frequency of any disease such as myocardial infarction, obesity, or asthma.rn
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