http://www.foodretro.com/that-time-my-kid-touched-a-kit-kat-and-could-have-died-a-story-about-life-with-food-allergies/ (http://www.foodretro.com/that-time-my-kid-touched-a-kit-kat-and-could-have-died-a-story-about-life-with-food-allergies/)
This might help some understand what it is like to have a FA child.