Healthy People 2020 is the current national United States agenda concentrating on health through disease prevention and health promotion.
Disease
A disease is a specific aberrant condition that adversely affects the structure or function of all or part of an organism and is not caused by an external harm. Diseases are frequently defined as medical disorders with particular indications and symptoms. External factors such as infections or internal dysfunctions can both cause disease. Internal immune system malfunction, for example, can result in a wide range of diseases, including immunodeficiency, hypersensitivity, allergies, and autoimmune disorders. In humans, disease is frequently used more generally to refer to any condition that causes discomfort, dysfunction, distress, social problems, or death to the person affected, as well as equivalent problems for those who come into touch with the person.
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