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What is an autoimmune disorder?

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Juvenile rheumatoid artritis (JRA) is an autoimmune disorder, which means that the body mistakenly identifies some of its own cells and tissues as foreign. The immune system, which normally helps to fight off harmful, foreign substances such as bacteria or viruses, begins to attack healthy cells and tissues. The result is inflammation -- marked by redness, heat, pain, and swelling.

SOURCE: 

National Institute of Arthritis and Musculoskeletal and Skin Diseases.

Reviewed by David Zelman on January 30, 2019

SOURCE: 

National Institute of Arthritis and Musculoskeletal and Skin Diseases.

Reviewed by David Zelman on January 30, 2019

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Why do children develop juvenile rheumatoid arthritis (JRA)?

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