COVID-19 pandemic – driven by the Delta variant – is now underway in Canada, the country’s top doctor said on Thursday.Dr. Theresa Tam, chief public health officer of Canada, told reporters at a news conference that projections from a few weeks ago have now come to fruition.“The latest national surveillance data indicate that a fourth wave is underway in Canada and that cases are plotting along a strong resurgence trajectory,” she said, adding the country has 13,000 active cases, which is more than double from two weeks ago.On average, more than 1,500 new cases are being reported daily, with the majority of them reported in the 20-to-39-year-old age group, she said.“After several months of declining severity trends, we’re now seeing early.