Top Ontario health official says coronavirus surveillance is widening

Ontario's chief medical officer of health says surveillance for novel coronavirus in the province is widening, outside of people who have recently travelled to the affected regions of China. Dr. David Williams says it has now been 14 days — the maximum incubation period for the virus — since some parts of China were quarantined, so anyone returning from those regions would have likely already shown symptoms if they were infected. But more people in Ontario are still being tested each day for the virus and doctors are asking for patients to be tested who don't strictly meet the case definition of symptoms plus recent travel to the affected area.