My son has a peanut allergy. My husband bought him a soft serve ice cream this evening with sprinkles. I licked it and there was a peanut in my lick. The ice cream was mostly gone at that point. he did not have a reaction, but I gave him benadryl and he has been fine. If there wasn't an initial reaction, could he still have a delayed reaction? We had a situation last summer where we had an initial reaction and then a full anaphylactic reaction three hours later because we were outside playing.