As many as 50 million Americans live with an autoimmune disease, a broad category of disorders in which the immune system ...

Autoimmune arthritis occurs when the immune system mistakenly attacks healthy joints and tissues, causing chronic ...

At first, it often begins unremarkably. A bit tired, a tugging in the stomach, dry eyes, maybe a rash that won’t go away.

The 23 pairs of human chromosomes. People who inherit two tall X chromosomes (bottom right) are much more susceptible to autoimmune diseases than people with one X and one short Y chromosome. BSIP / ...