I would recommend giving your child an children's antihistamine such as Kids Claratin or Kids Reactine while on vacation. Perferably the 24 hr kind. I'm deadly allergic to Peanuts and find that if I've got a good antihistamine in me that it prevents for the most part a reaction from them. If it doesn't stop the reaction at least I get a lesser reaction than without the antihistamine in me. I always take Reactine on vacation daily, as I never know when I'm going to encounter trace amts of peanuts on my vacation. I know many people are against overdosing their children on drugs, but for vacations, it'.s a good preventative measure against a more severe reaction, especially kids with severe allergies. Just my 2 cents worth.