Food Safety Report: McDonald's, U.S. Highway 40, Vernal, UT, USA 7 months ago • details 21 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Stomach Pain, Cramps Suspected source: Not sure Onset: 1 to 2 days Duration: 12 to 24 hours Sick: 3 people