Food Safety Report: Schezwan Chicken chow mein, Guwahati, Assam, India 7 months ago • details Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Chills, Headache Suspected source: From eating Schezwan Chicken chow mein Onset: 12 to 24 hours Duration: Less than 4 hours