Rheumatoid Arthritis: Overview

If you have rheumatoid arthritis (RA), you've got plenty of company. About 1.3 million people in the U.S have the condition; about two-thirds of them are women. RA is a chronic disease in which your immune system attacks the joints, causing pain, swelling and stiffness. This can make it harder to do things like walk, dance or just get around the house.

Updated November 2012
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