coronavirus contact tracing efforts will be launched nationally in the coming weeks, Prime Minister Justin Trudeau announced on Thursday.Trudeau said the app, which will be tested in Ontario, will notify users if they’re been exposed to COVID-19 and its use will be “completely voluntary.”“At no time will personal information be collected and shared and no location services will be used,” Trudeau said. “The privacy of Canadian will be fully respected.” The prime minister’s update came as Canada’s COVID-19 count surpassed 100,000 known cases and about four weeks after he said the federal government was reviewing several smartphone apps and gearing up to “recommend strongly” a particular app.However, on June 1, Health Minister Patty Hajdu said.