As scientists and public health officials learn more about the novel coronavirus, new advice is emerging about the question on everyone’s minds: should you wear a mask when you leave your house?
According to Dr. Theresa Tam, Canada’s chief public health officer, masks — both medical and non-medical — can be effective in preventing the spread of COVID-19.
People who don’t have symptoms can wear non-medical masks when in public as “an additional measure” to protect other people, Tam said in a news conference Monday.
There is growing evidence that people infected with the virus are able to transmit it before they develop symptoms, she said.