Once people started worrying about allergies, they started avoiding various foods, which caused more allergies... http://www.npr.org/sections/thesalt/2015/02/2

Once people started worrying about allergies, they started avoiding various foods, which caused more allergies... http://www.npr.org/sections/thesalt/2015/02/23/388450621/feeding-babies-foods-with-peanuts-appears-to-prevent-allergies http://www.npr.org/sections/thesalt/2015/02/23/388450621/fee...