Afer taking many plant taxonomy and botany classes I did some research and from what I can tell everyone is allergic it just depends upon an individuals tolarance. For instance if one is exposed once a year and never gets it and another person ten times and gets pioson ivy once there is a chance that the one who did not get it is more allergic than the next. It's a tollerance thing once that tollarnce has been reduced buy continued exposure... Pioson Ivy develops. I hope this makes sence...


Tim