How many Americans have an autoimmune disease?

Approximately 50 million Americans, 20 percent of the population or one in five people, suffer from autoimmune diseases. Women are more likely than men to be affected; some estimates say that 75 percent of those affected–some 30 million people–are women. Still, with these statistics, autoimmunity is rarely discussed as a women’s health issue.

Last updated on April 29, 2017