![]() ![]() The number of people with signs of a previous infection in their blood (infection-acquired seroprevalence) has increased steeply during the Omicron wave in every province (Figure 2). ![]() New sublineages in the Omicron line have been continuing to spread since then, and the percentage of Canadians who have had a SARS-CoV-2 infection is now likely well above 50%.” “Across the country, our analysis of the data suggests that 17 million Canadians had an Omicron infection in the period December to May, for an average of more than 100,000 infections per day. “Omicron has been a tsunami,” states CITF Executive Director Dr. A fuller account of the analysis can be found online here. Between December 2021 and May 2022, the proportion rose by 45% of Canadians having antibodies to SARS-CoV-2 infection (see Figure 1 below). Before the arrival of the Omicron variant, approximately 7% of Canadians had infection-acquired antibodies to SARS-CoV-2, the virus that causes COVID-19. ![]() MONTREAL, J– An analysis of data from 21 studies, funded by the Government of Canada through its COVID-19 Immunity Task Force (CITF) and that relied on blood testing, provides a clearer picture of the massive scale of the Omicron wave in Canada. ![]()
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January 2023
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