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Why do some people develop autoimmune diseases?
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Autoimmunity is a condition in which the immune system attacks the body’s own cells. The most common autoimmune diseases are rheumatoid arthritis, multiple sclerosis, and lupus. Autoimmune diseases are caused by a combination of genetic and environmental factors. Some people are born with a genetic predisposition to develop autoimmune diseases, while others develop them after exposure to certain environmental triggers.