I'm curious if there will can ways to use the autoimmune system to fight cancer in people with autoimmune diseases. Knowing someone with RA that has had cancer

I'm curious if there will can ways to use the autoimmune system to fight cancer in people with autoimmune diseases. Knowing someone with RA that has had cancer in the past it really complicates things because stimulating the immune system flares up RA. Often RA treatments involve suppressing the immune system.