Gupta R, Blumenstock J, Warren C, Mittal K, Kotowska J, Smith B (2017) Ann Allerg Asthma Im 2017 Nov. 119; 5: S11
Data suggest shellfish allergy is common amongst US adults, and nut allergies in adults are comparable to similar allergies among children. Roughly, half of all food-allergic adults surveyed reported 1+ adult onset food allergy.
Abstract and full article are available to read here.