More than a hundred people are still in hospital in Harbin following a mass food poisoning incident which proved fatal for a 77 year-old patient.  The incident occurred on Monday at the Heilongjiang Provincial Hospital of Traditional Chinese Medicine in Harbin, the provincial capital.  According to Song Chunhua, deputy chief of criminal investigation at the Harbin public security bureau, the hospital cook drew water from a boiler in the corridor of the rehabilitation center early on Monday in order to prepare a rice-based porridge.  But the water was contaminated with fluoroacetamide, a product used to kill insects and rats.A total of 203 in-patients and their helpers, as well as hospital staff who ate the porridge for breakfast, fell ill. Most of them complained of nausea and diarrhea.