Food Safety Report: Amazon Fresh, Pomerado Road, Poway, San Diego, CA, USA 2 years ago • details 10 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Cramps Suspected source: Frozen sweet potatoes Onset: 4 to 12 hours Duration: 4 to 12 hours Sick: Me Additional information: Not sure if it's food poisoning