Food Safety Report: Pret A Manger, Aéroport Nice, Rue Costes et Bellonte, Nice, France 1 year ago • details Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Fever Suspected source: Pret a Manger BLT Sandwich Onset: 4 to 12 hours Duration: 4 to 12 hours