Anyone else think of that episode of Futurama when Fry eats an egg salad sandwhich? 
No, but I am now
But it does support my long-held theory that people raised in filth have a better auto-immune system (I think it also applies to people raised on working farms).
I think I'm living proof of that.
From what I gather, that's one of the things that people have said it could help, over-reactive immune systems.
Though it kind of makes me think that we're going back to the dark ages of leeches and covering your manhood in cheese before dropping mice down your pants.