The Public Health Agency of Canada is now recommending Canadians choose a 3 layer non-medical mask with a filter layer to prevent the spread of COVID-19 as they prepare to spend more time indoors over the winter.
Chief Public Health Officer Dr. Theresa Tam made the recommendation during her bi-weekly pandemic briefing in Ottawa last Tuesday, November 3.
She said its to improve the level of protection that can be provided by nonmedical masks or face coverings, we are recommending that you reconsider a 3-layer nonmedical mask.
According to recently updated guidelines, two layers of the mask should be made with tightly woven fabric, such as linen or cotton, and the middle layer should be a filter-type fabric, such as fabric like canvas.
“We’re not necessarily saying just throw out everything that you have” Tam told reporters, suggesting adding a filter can help protection.
“This is an additional recommendation just to add another layer of protection. The science of masks has really accelerated during this particular pandemic. So we’re just learning again as we go.”
She says “I do think that because it’s winter, and because we’re all inside, we’re learning more about droplets and aerosols.”
She also urged Canadians to wear well fitted masks that cover the nose, mouth and chin without leaving gaps.