Nearly one-third of the Canadian population has had COVID-19, antibody data shows – National | Globalnews.ca


After greater than two years of the COVID-19 pandemic, a 3rd of the Canadian inhabitants has seemingly been contaminated with the virus, in keeping with analysis and consultants.

Seroprevalence analyses of blood samples throughout the nation present that the fast unfold of the extremely contagious Omicron variant has doubled the pure an infection charge.

By the tip of February, infection-acquired seropositivity averaged 23.7 per cent nationally — a two-fold leap from January’s charge — according to the latest report launched earlier this month by the Canadian Blood Providers and Canada’s COVID-19 Immunity Process Power.

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The rise in infections was seen in all provinces, with Alberta, Manitoba and British Columbia having the very best seroprevalence charges for the month of February. The report doesn’t embrace Quebec.

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Younger Canadians within the 17-24 age group had the very best pure an infection ranges at 36.3 per cent in comparison with different age teams.

“I might assume after two years, it’s very seemingly now {that a} third of the inhabitants has had a COVID an infection,” stated Dr. Catherine Hankins, co-chair of the COVID-19 Immunity Process Power.


The Omicron wave that hit Canada in November 2021 evaded immunity, with reinfections and breakthrough instances occurring, stated Hankins.

“Omicron had a capability to evade the antibodies that we had constructed up from both a earlier an infection or vaccination,” she stated.

In response to Hankins, the hardest-hit provinces are within the east, together with Ontario and Quebec.


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Out west, the British Columbia Centre for Illness Management in partnership with LifeLabs has been monitoring SARS-CoV-2 antibodies in blood samples because the begin of the pandemic.

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Their evaluation additionally reveals the drastic impression Omicron had on the inhabitants.

Learn extra:

Nearly one in four Canadians have caught COVID-19, poll suggests

By March 2022, their newest sero-survey — which has not but been revealed — signifies that greater than 40 per cent of the inhabitants had infection-induced antibodies, stated Dr. Danuta Skowronski, lead researcher and epidemiologist at BCCDC. In distinction, up till fall 2021, solely 10 per cent of the province had been contaminated, she stated.

The most important change has been in youngsters, with about two-thirds below the age of 10 having caught the virus, Skowronski stated. In the meantime, about half of B.C.’s younger grownup inhabitants has been contaminated.

“We’ve gone from a inhabitants with near-total susceptibility to the virus, whereas now greater than 90 per cent of us have had some type of priming, both via vaccination or an infection,” she stated.

“We’re not a very naïve inhabitants.”


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Being primed doesn’t imply the physique is resistant to the virus however is not less than acquainted with it, so our immune system is on alert and ready to battle the virus, which ought to cut back the chance of extreme outcomes, Skowronski defined.

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Having already had a COVID-19 an infection doesn’t defend you from being contaminated once more, consultants say.

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More than half of the U.S. has had COVID-19, antibody study indicates

Nevertheless, each vaccination and an infection may also help construct what known as “hybrid immunity” or an “immunity wall,” stated Hankins.

“In case you’ve already had the an infection, it’s actually value getting vaccinated,” she stated.

However given the altering nature of COVID-19 with new variants rising, there may be at all times the chance of waning immunity and an infection, stated Hankins.

“We now have a superb degree of immunity now and if we’re sensible and we comply with precautions, we are able to get on the market and have a full summer season.”

As of Tuesday, greater than 3.7 million COVID-19 infections have been confirmed throughout Canada because the pandemic started.


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