Food Safety Report: Wendy's, 5673 West 6200 South, West Valley City, UT 84118, USA 6 months ago • details 9 Suspected food poisoning. Symptoms: Diarrhea, Vomiting, Fever, Stomach Pain, Chills Suspected source: Wendy's cheeseburger Onset: 4 to 12 hours Duration: 12 to 24 hours Sick: 2 people