It can. It’s not common, from what I understand, but there are cases where it has put various autoimmune disorders into remission, either temporary, or permanent.
That said, you become far more likely to end up sick with a whole bunch of other stuff, which can then eliminate any benefits for the autoimmune disorders.
Oh, and there’s also a chance it will give you an autoimmune disorder.
Absolute bastard, if you ask me.