Food Safety Report: Wendy's, Kannapolis Parkway, Kannapolis, NC, USA 11 months ago • details 2 Suspected food poisoning. Symptoms: Diarrhea, Nausea, Stomach Pain, Cramps, Headache Suspected source: Hamburger Onset: 4 to 12 hours Duration: 12 to 24 hours Sick: 2 people