A girl dies after eating Chinese food at a North Carolina shopping mall in 2005. A Massachusetts boy dies after one bite of a cookie at a friend’s house in 2006. A girl dies after consuming a burrito at a shopping center near her home in Esquimalt, Canada, in 2007. What do these tragedies have in common? Each fatality was a teenager with a severe food allergy. And none of the victims was carrying self-injectable epinephrine, the drug that might have saved their lives.