JIA is a form of arthritis in children:
Juvenile means people aged 0-17 years
Idiopathic means the cause is not known
Arthritis is inflammation of the joint
Chronic (or long term) arthritis in children is more common than many people think, including many doctors. It occurs in one child in every thousand, which is slightly less frequent than diabetes. It is an inflammatory disease principally affecting the joints but may also affect other organs including the eyes.
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