Canada's top doctor stresses restrictions needed for a while longer amid variant spread

Canada's chief public health officer Dr. Theresa Tam stressed on Tuesday it was not time for people to "let down our guard," saying community-based restrictions would be needed for a while longer as coronavirus variants continued to spread, with the B.1.1.7 variant accounting for more than 90 per cent of variant cases. But she also advised there was early evidence to suggest the P1 variant, which had nearly doubled in the past week, with the majority of reported cases in B.C. and Ontario, could reduce vaccine effectiveness.