As Hong Kong battles the spread of a novel coronavirus originating in mainland China, Hong Kong people who lived through a previous deadly viral outbreak are calling on the government to step up measures against the latest threat. In 2003, severe acute respiratory syndrome (Sars) infected 1,755 people in Hong Kong, killing 299 people including eight medical staff. The South China Morning Post spoke with Sars survivors Cathy Kong and Ken Chan Kai-yuen, as well as William Yip Hing-kwok, the…