Canadian technology firms Shopify Inc and Blackberry Ltd are developing a mobile contact testing app for the novel coronavirus, Prime Minister Justin Trudeau said on Thursday.

California on Thursday ordered residents to wear masks in “most settings outside the home,” saying the new rule was necessary because too many Californians were neglecting to cover their faces during the coronavirus pandemic.

The number of people who died from coronavirus infection in France rose by 28 to 29,603 on Thursday, the same increase as Wednesday, but the number of new confirmed cases crept up again to reach a five-day high.

Canada officially racked up 100,000 cases of the novel coronavirus on Thursday and although the outbreak is slowing, health experts said major challenges remain.

A person’s blood type and other genetic factors may be linked with severity of coronavirus infection, according to European researchers looking for further clues about why COVID-19 hits some so much harder than others.

Iran is approaching 10,000 deaths from the coronavirus outbreak in the country, according to official figures from the Ministry of Health.

Britain will switch to the Apple and Google model for its COVID-19 test-and-trace app, ditching an attempt to develop an app by itself after the homegrown system did not work well enough on Apple’s iPhone, the government said on Thursday.

The number of people who died from coronavirus infection in France rose by 28 to 29,603 on Thursday, the same increase as Wednesday.

Britain’s health minister declined on Thursday to set a date for when a smartphone app to help trace people who have been in contact with a person infected with the new coronavirus would be rolled out.

Johnson & Johnson is in talks with multiple governments and global organizations as it seeks to develop a COVID-19 vaccine, it said on Thursday after Reuters reported that the U.S. company is in talks over a potential EU supply deal.