The way my allergist explained it, the immune dysfunction is part of your system, the particular sensitivities are developed. So if you're prone to allergies, you may eventually become allergic to whatever you're exposed to. Moving might buy you a few years until you become sensitive to the local allergens - it's not a permanent solution. I had about six good winters in Florida before I was every bit as miserable in cedar season as I used to be in ragweed season before I started getting shots. This year I became sensitive to oak pollen for the first time, too. Oh joy.