Food Safety Report: Subway, East Northwest Highway, Mount Prospect, IL, USA 1 year ago • details 14 Suspected food poisoning. Symptoms: Diarrhea, Nausea, Stomach Pain, Chills, Headache Suspected source: food here Onset: 12 to 24 hours Duration: Several Weeks Additional information: Spouse also had 1 day diarrhea in the past