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  1. Nov 13, 2023 · The words "disorder" and "disease" are sometimes used interchangeably, but there are clear differences between them. A disorder is a group of symptoms that disrupts your normal body functions but does not have a known cause, while a disease is a medical condition with an identifiable cause.

  2. Sep 27, 2020 · Epidemiologists study how diseases affect a population. An epidemic is a disease that occurs in an unusually high number of individuals in a population at the same time. A pandemic is a widespread, usually worldwide, epidemic. An endemic disease is a disease that is constantly present, usually at low incidence, in a population.

  3. Jul 22, 2023 · Obesity is a complex disease involving having too much body fat. Obesity isn't just a cosmetic concern. It's a medical problem that increases the risk of many other diseases and health problems. These can include heart disease, diabetes, high blood pressure, high cholesterol, liver disease, sleep apnea and certain cancers.

  4. Human disease, an impairment of the normal state of a human being that interrupts or modifies vital functions. Disease may be trivial if the impairment is minimal. It may also be associated with illness or be latent, becoming apparent at some later time. Learn more about human health and signs and symptoms of disease.

  5. 4 days ago · It may result from a course of medical treatment, either as an unavoidable side effect or because the treatment itself was ill-advised; in either case the disease is classed as iatrogenic. Finally, the disease may be caused by some agent external to the organism, such as a chemical that is a toxic agent. In this case the disease is ...

  6. Feb 18, 2022 · Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They're normally harmless or even helpful. But under certain conditions, some organisms may cause disease. Some infectious diseases can be passed from person to person.

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  8. Oct 4, 2024 · Chronic diseases are the leading cause of illness, disability, and death in America. Most chronic diseases are caused by a short list of risk factors: smoking, poor nutrition, physical inactivity, and excessive alcohol use. Some groups are more affected than others because of factors that limit their ability to make healthy choices.

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