AUTOIMMUNITY

Under normal conditions, the immune system protects the body from diseases and infections by killing harmful “foreign” substances, such as germs, that enter the body. Autoimmunity is a condition in which the immune system mistakenly attacks and harms the body’s own cells and tissues; this immune reaction is the basis of a variety of autoimmune diseases including some forms of uveitis, diabetes, rheumatoid arthritis, and systemic lupus erythematosus, among others. Uveitis on the basis of autoimmunity is the most common form of uveitis.

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