What is the Burden of Systemic Lupus Erythematosus (lupus) in the United States?
Systemic lupus erythematosus affects a conservatively estimated 322,000 to possibly over a million people in the United States.1 [Due to the lack of definitive epidemiological information, the exact number of people with lupus is currently unknown.] About nine out of 10 people who have lupus are women.