Limits of Epidemiology
نویسنده
چکیده
health and disease in populations. As such it is considered to be the basic science of public health, the activity of preventing disease and promoting health in populations [1]. This focus on primary prevention of disease in large groups has distinguished public health from medicine, which focuses on treatment and prevention of disease in individual patients. To provide the basic science for public health, as the clinical disciplines do for medicine, epidemiology must try to explain, and thereby suggest ways to improve, the experience of disease and health in populations as distinct from individual patients. Treatment for a patient is affected by the explanations that the basic medical sciences provide for a particular condition. Thus one kind of basic science suggests a pharmacological treatment, while another suggests a nutritional intervention. Furthermore, the understanding of pathological processes changes over time with basic scientific knowledge and the experience of clinical application, so that medical approaches for treating a given condition change. Similarly, public health policy depends on epidemiological explanations of health
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