Well and allergy is something your body can't handle, so i'd say yes. I don't have any allergies but one of my friends is allergic to almost everything, not extremely but he's allergic to grass, cats, bushes, tumble weeds, 99% of trees and other things im sure, that's just what I remember from him telling me 5-6 years ago.
I think I'm allergic to pollen, not sure. Must suck to be allergic to fish, dairy products, nuts and a whole lot of other things, like someone in my class.