Food Safety Report: Panera Bread, Union Street, Westborough, MA, USA 9 months ago • details 14 Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Stomach Pain, Cramps, Chills, Headache Suspected source: panera bread mac & cheese Onset: Less than 4 hours Duration: 12 to 24 hours Sick: 1