Food Safety Report: Walmart Supercenter, George Washington Memorial Highway, Yorktown, VA, USA 3 years ago • details 5 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting Suspected source: Pepperoni mozzarella flatbread Onset: 4 to 12 hours Duration: 4 to 12 hours Sick: A loved one