Anyone done this/considering it? (Involves deliberate infestation with certain parasites or worms to modulate the immune system).
Trials have been variable (perhaps due to methods; I'm not sure) but having investigated further it looks like thousands of people are treating allergies and autoimmune disorders this way and with relative success. It also appears to help both autism and anxiety.
There are a number of commercial providers.
I'm absolutely fascinated by the whole subject and whilst there is an "ick" factor, think it could definitely be overcome!