Many years ago I was acutely allergic to bee stings. I was prescribed a "Epi" pen and used it several times. Eventually however, I noticed I had developed a tolerance to bee stings, and no longer carry my epi pen. Rather, I take a couple of Benytril and go on with my day. Does it make medical sense that one could develop a tolerance with the occasional bee sting? Will the immunity go away if I don't get stung again for a period of time?