[kortex]

Yep, you got the gist in the ninja edit.

The IgE-parasite connection is actually a bit part of the hygiene hypothesis, and I have personal experience with helminth therapy. It put a serious permanent dent in my animal and pollen allergies, long after the session (I forget how long they were active but I re-inocculated N. americanus twice and it was roughly a 2-3 year period).

Once you get over the squick factor and the really terrible itching at the site that lasts 12-24h, it's great.