There's a lot of info here, but one thing that really struck me was at the top of page 2 - a possible source of mystery reactions that most people would not consider:
https://allergicliving.com/2017/10/19/allergist-scott-sicherer-tackles-the-crucial-food-allergy-questions/ (https://allergicliving.com/2017/10/19/allergist-scott-sicherer-tackles-the-crucial-food-allergy-questions/)
Interesting GN! Thanks for posting.