Food Safety Report: Whataburger, East Milam Street, Mexia, TX, USA 2 years ago • details 5 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Fever, Chills Suspected source: Not sure Onset: 4 to 12 hours Duration: 12 to 24 hours Sick: 3 people