Are autoimmune diseases more common in black people or there's no difference?

Some are: There are certain diseases that are more common in black persons than not. The ultimate autoimmune disease - systemic lupus erythematosus - is more commom in blacks than non- black persons but many other autoimmune diseases do not show any racial preferences.

Some yes,some not!: Certain diseases considered autoimmune occur more frequently in one racial group compared to another, and even within certain nationalities within a specific race. Sarcoidosis, sle, and gout are more frequent in blacks. Spondylitis, psoriatic arthritis and psoriasis are more likely in caucasians. American blacks have a 20-30% mixture of caucasian genes, and different in immune probs than africans.