A disease is an abnormal condition that affects the body. Often a disease, an illness, and an infection are used interchangeably. Many diseases can be prevented with proper nutrition and care. Deepak Hiwale said, "Preventing disease rather than curing them makes more sense - Doctors of the future will be clinicians, dieticians, and personal trainers rolled into one!"
A disease is an abnormal condition that affects the body of an organism. It is often construed as a medical condition associated with specific symptoms and signs. It may be caused by factors originally from an external source, such as infectious disease, or it may be caused by internal dysfunctions, such as autoimmune diseases. In humans, 'disease' is often used more broadly to refer to any condition that causes pain, dysfunction, distress, social problems, or death to the person afflicted, or similar problems for those in contact with the person. In this broader sense, it sometimes includes injuries, disabilities, disorders, syndromes, infections, isolated symptoms, deviant behaviors, and atypical variations of structure and function, while in other contexts and for other purposes these may be considered distinguishable categories.
Contributions by Alteripse, Jfdwolff, and Kd4ttc.