My doctor once remarked that I was "allergic to the planet Earth." I have severe environmental allergies and food allergies. During the spring my life is hell. But by far the most frightening thing I'm allergic to is peanuts. One wrong snack and I'm dead.
It comes up more often than you would think. Even this morning one of our sales team brought in cookies for everyone and we had to figure out if any contained peanuts. And I don't carry an EpiPen. I'm actually not sure why to be honest, I just never have.