Canada's top health officials are warning that Canada could be seeing the beginning of a fourth COVID-19 wave driven by the more infectious delta variant. "I think we are in a slightly precarious period at the moment, in between these people trying to get the vaccines in and reopening," Tam said. Health officials are looking at the 18 to 39 age demographic as the key to addressing a possible fourth wave. Although its case numbers are lower overall now, Alberta is seeing the virus spread faster than it did during the peak of the third wave, with case counts now being driven by the more infectious variant. Tam said that while it's up to provinces to decide on their own health measures, she still strongly encouraged people who contract COVID-19 to self-isolate.

Source: CBC News July 30, 2021 15:31 UTC