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Any healthy body produces a variety of antibodies, proteins in the blood whose job is to protect the body from unwanted bacteria, viruses, and cancer cells. The cells and organs that deal with such infections make up the immune system. In some people and animals, for various reasons, the antibodies become overactive and turn on the body's healthy tissues as well; the result is an autoimmune disease—an immune response directed against one's own self. More than eighty autoimmune diseases have been identified, the best-known being type 1 diabetes, multiple sclerosis, lupus, and rheumatoid arthritis.
First Known Use of autoimmune
Medical Definition of autoimmune
: of, relating to, or caused by antibodies or T cells that attack molecules, cells, or tissues of the organism producing them <autoimmune diseases>
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Britannica English: Translation of autoimmune for Arabic speakers
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