The human body is truly incredible, and the immune system in particular. Each of us has a custom designed garbage collection system tailored for our bodies. I predict the next big leaps in medicine will come from empowering and leveraging that system to fight everything from infection to cancer.
Agreed, autoimmune diseases are obviously something to be wary of. Not similar to wildfire management, I think we're being foolish if we don't leverage the forces that have powered a natural ecosystem for millennia, instead of trying to replace them.