COVID-19 cases continue to decline across the country, but the highly contagious Delta variant stands a chance of unravelling some of the progress Canada has made, according to new national data from the Public Health Agency of Canada (PHAC).The modelling, released Friday, offered an updated picture of the current COVID-19 pandemic facing Canada, showing that the Delta variant may result in “greater than previously expected resurgence this fall and winter.”“Over the past two months we’ve made significant process in bringing COVID-19 disease activity down and raising vaccination coverage up,” chief public health officer Dr.