Food Safety Report: Halong Bay One Day, Đương Trần Nhăt Duăt, Old Quarter, Dong Xuan, Hoan Kiem, Hanoi, Vietnam 1 year ago • details 3 Comments Comment Suspected food poisoning. Symptoms: Diarrhoea, vomiting, stomach pain, cramps, other: circulatory problems Suspected source: Not sure Onset: Less than 4 hours Duration: Less than 4 hours Sick: I