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Yes, micro exposure is basically what allergy shots will do. His method was a whole lot cheaper.

pretty interesting. would he ingest the baby poison or rub it on himself?

In this case, he would rub it on his skin.

I learned a long time ago, that when you visit a new place, you should drink just a little sip of their tap water to inoculate yourself with whatever is in their water.

I do it for my children, and it seems to be good for them.

Sounds like a similar thing.

Thanks for sharing, super interesting.