A teenager has died after having an allergic reaction on holiday with her family in Rome. Prosecutors have launched a manslaughter investigation after the girl, understood to be from Tunbridge Wells, passed away after going into anaphylactic shock. It is thought that she had a dessert that contained traces of peanut in dried fruit, according to reports in the Italian press. The 14-year-old ate at a pizzeria in the Gianicolense district and went into shock approximately 15 minutes after her family returned to their hotel. She was taken to the San Camillo hospital, where she passed away. Her fat…