[laughter] >> raana gregg is gieve's mother. >> thank goodness he didn't have any breathing problems at that point. it was just the hives, and the swelling. >> at stanford, a treatment called oral immunotherapy was effectively desensitizing patients--one allergen at a time. 11 year old lauren is being treated for her nut allergies. >> so you get the choice of mixing it with applesauce, chocolate pudding or vanilla pudding. >> okay, chocolate. >> but doctors faced a new problem. a third of people who suffer from allergies are allergic to not just one, but multiple foods. >> the minute you have a food allergy you also have a higher rate and chance of having other food allergies too. >> in 2009, the team at stanford decided to tackle this problem head on. >> no one was actually looking at trying to treat pple with multi-allergies. >> so just one up until that point. >> exactly if someone has milk, egg, wht, cash, peanut, t's treat them carefully at lowos.e but very >> i had lot of anxiety, mostly going to school. at lunch i had to sit at my own tae th ahe kids withfood aller i couldn't