Food Safety Report: Panera Bread, Convenience Place, Champaign, IL, USA 2 years ago • details 46 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Cramps, Headache Suspected source: (maybe the emerald greens on the sandwich?) Onset: 4 to 12 hours Duration: 12 to 24 hours Sick: Me