Ankylosing Spondylitis: Overview and More

Autoimmune diseases occur when a person's immune system mistakenly attacks its own cells and tissues, thinking that it is sick. There are over 100 different autoimmune diseases, and while some target one organ in your body (like the thyroid in Hashimoto's thyroiditis), others target multiple organs (like the skin, kidneys, and others in lupus).

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