It was subsequently diagnosed as severe acute respiratory syndrome (SARS), a deadly new disease that spread to others because Tse was left untreated for over 16 hours in the Scarborough Hospital’s emergency department.

After the death of 44-year-old Tse, Greater Toronto Area went on to see two pandemic outbreaks, including SARS II that broke out at North York General Hospital.

Justice Archie Campbell’s commission into SARS referred to Tse’s final hours in Scarborough Hospital as ‘the kick-start of the outbreak.’ Tse transmitted SARS to two other patients that set off an infectious chain spreading through Scarborough Grace Hospital and from there to other hospitals through patient transfers.  Finally 44 patients died of SARS and 330 others were seriously sick by the infection.  The report urged the officials to learn from previous omissions and implement crisis management techniques more efficiently in case another pandemic strikes in the future.

Health Minister George Smitherman announced Ontario’s new Health Protection and Promotion Agency at a press conference to commemorate the fifth anniversary of SARS.  The agency, which will be modelled on the U.S. Centers for Disease Control and Prevention, is to be named after Dr. Sheela Basrur, Toronto’s former medical officer of health.  Dr. Basrur helped control a panic situation and reassure the terrified people in Toronto by her public appearances during the SARS crisis.