Food Safety Report: Namu Kitchen, South Glendora Avenue, West Covina, CA, USA 6 months ago • details 13 Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Fever, Stomach Pain, Cramps, Chills, Headache Suspected source: Undercooked french toast Onset: Less than 4 hours Duration: Several days