I came across this website (http://www.wwmag.net/pivy.htm) where this guy claims that by actually eating the leaves of poison ivy just a few times, you afford yourself at least a year's worth of immunization to the plant! While I get the rashes multiple times each year, especially when scouting and hunting, I don't know if I have the 'nads to actually eat this stuff in an attempt to become immune to it.