Canada is heading towards a 'Delta-driven' fourth wave, Tam says

Canada is seeing a 'slight increase' in new COVID-19 cases, and thousands more infections are predicted if contacts aren't contained, warns new national modelling released Friday.The new picture on Canada' s pandemic trajectory shows the serious threat the highly-contagious Delta variant is posing, and the risk those who remain unvaccinated pose to the country being thrust into a fourth wave.