[Az-Geocaching] Re: Phoenix area caches

[Brian Cluff]

> Everyone is born with some degree of tolerance, or immunity to these
> chemical "reactions."  With repeated exposure, this tolerance will
> decrease, until the body develops a defensive reaction - which results in
> the rash, etc.  Some people only need one exposure to get the body to
> react.  Others require many, but it's not infinite.

That sounds like the exact opposite of the way the immune system works.
Isn't the reason you get shots to give your immune system practice so that
it knows what to do what it gets the real thing.  Seems like it should work
in a similar way with poison ivy/oak.

Brian Cluff
Team Snaptek