The app, announced Thursday by Prime Minister Justin Trudeau, will be beta tested in Ontario starting on July 2 and is expected to launch nationally soon after.

The prime minister said the app, which will be tested in Ontario, will notify users if they've been exposed to COVID-19 and its use will be 'completely voluntary."

The app's compulsory use is raising concerns among privacy advocates, who say it is unclear how the data will be used and who stress that India lacks privacy laws to govern the app.

'Canadians put a very high value on their privacy,' Trudeau said of coronavirus tracing apps.

When someone is diagnosed with COVID-19, an entire team of people gets to work to try to determine who else may be at risk of contracting the virus.

Three hundred medical students in Alberta are helping health-care workers trace possible exposures to the COVID-19 virus.

Civil liberties experts question the effectiveness of apps that use location data to track potential coronavirus cases, saying governments should also consider privacy rights.