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Canada could be seeing the start of a variant-driven 4th wave, chief health officer warns

Seriousness of resurgence will depend on vaccination rates, Tam says

Chief Public Health Officer Dr. Theresa Tam provides an update on the COVID pandemic during a press conference in Ottawa on Tuesday, Nov. 17, 2020.

Chief Public Health Officer Dr. Theresa Tam provides an update on the COVID pandemic during a press conference in Ottawa on Tuesday, Nov. 17, 2020.

Photo: La Presse canadienne / Sean Kilpatrick

RCI

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.

The seriousness of the pandemic's resurgence will depend largely on vaccination coverage — especially as provinces move forward with reopening plans — Chief Public Health Officer Dr. Theresa Tam said today.

I think 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.

As soon as that balance is tipped, and it wouldn't take very much with a highly transmissible virus, you're going to see an uptick in cases.

Health officials are looking at the 18 to 39 age demographic as the key to addressing a possible fourth wave.

Roughly 70 per cent of that age group has received a vaccine shot, but Tam said that number needs to rise to 80 per cent in order to avoid overwhelming hospitals.

This could significantly reduce the size and impact of the resurgence, she said.

Delta leading to faster spread in some regions

Some provinces are starting to see rapid spread of the delta variant already.

B.C. declared a COVID-19 outbreak in the Central Okanagan (new window) after a rapid rise in cases in the region and is reimposing a local mask mandate, as well as other public health measures.

B.C. Provincial Health Officer Dr. Bonnie Henry said the spread of the delta variant in the area is alarming, but she believes the new measures will help flatten the spike in numbers.

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 (new window), with case counts now being driven by the more infectious variant.

Despite the faster spread, Alberta recently announced that those who test positive for COVID-19 will no longer be required to enter isolation (new window) starting August 16.

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.

I would ask any individual who is diagnosed with COVID-19, or you think you may have it, please isolate, Tam said.

Darren Major (new window) · CBC News

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