General Population

Age-stratified SARS-CoV-2 Serological Prevalence Estimation Using Anonymized Residual Sera Following Delta and Omicron Waves in the Northwest Territories (NWT)

Kami Kandola, University of Calgary & University of Alberta

In the Northwest Territories (NWT) more than 10,000 SARS-CoV-2 infections were reported between March 2020 and March 2022 (the majority of cases were self-reported rapid antigen tests from late December 2021 to March 2022), and over 99,000 vaccine doses were provided to NWT residents by March 2022.
Research summary Results

Canadian COVID-19 Antibody and Health Survey (CCAHS) second cycle

Ron Gravel, Statistics Canada

This second cycle of the Canadian COVID-19 Antibody and Health Survey (CCAHS) aims to better understand the impacts of the pandemic on the health and well-being of Canadians, including the prevalence of chronic symptoms and conditions and the challenges that Canadians may have faced in accessing healthcare.

Research summary

Surveying prospective population cohorts for COVID19 prevalence and outcomes in Canada (SUPPORT-Canada)

Philip Awadalla, Canadian Partnership for Tomorrow’s Health (CanPath)

Building on Canadian Partnership for Tomorrow’s Health (CanPath), a national population health research platform that follows the health of 330,000 Canadians, SUPPORT-Canada aims to capture data and biologics to help researchers and clinicians determine the factors that contribute to COVID-19 susceptibility and severity.
Research summary Results Study website

Seroprevalence study and cross-validation of high-throughput serological tests conducted by the COVID-19 Immunity Task Force (Héma-Québec)

Marc Germain, Héma-Québec

This study aims to estimate how many people have contracted SARS-CoV-2 in Quebec or have antibodies to the virus due to vaccination. Researchers will do this by determining the prevalence of antibodies in a sample number of blood donors. The study started after the first wave of the COVID-19 pandemic in Quebec.
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The Canadian COVID-19 Antibody and Health Survey (CCAHS)

Ron Gravel, Statistics Canada

Conducted by Statistics Canada, this survey aims to identify how many Canadians have been infected with SARS-CoV-2, the virus that causes COVID-19. Our study is the first to use a nationally representative sample to reflect COVID-19 seroprevalence across Canada at national, provincial, and territorial levels. This study is the first to use a nationally representative sample to reflect COVID-19 seroprevalence across Canada at national, provincial, and territorial levels.
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Deborah Money

Canadian Population Serological Survey Utilizing Antenatal Serum Samples

Deborah Money, University of British Columbia

This study analyzes blood samples from expectant women across the country to help determine the prevalence and spread of SARS-CoV-2 in Canada.
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Canadian Blood Services: SARS-CoV-2 Seroprevalence Study 

Sheila O’Brien, Canadian Blood Services

In this study, Canadian Blood Services aims to test approximately half a million samples from blood donors over a two-year period to provide data about COVID-19 infection rates in Canada. Samples will be monitored on a monthly basis using demographic and regional variables. Also, repeat donors will be tested multiple times to allow for longer-term tracking, and will possibly track how long immune responses to SARS-CoV-2 infection last.
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Canadian COVID-19 Prospective Cohort Study (CANCOV)

Angela Cheung and Margaret Herridge, University Health Network

The Canadian COVID-19 Prospective Cohort Study (CANCOV) aims to provide a comprehensive evaluation of early to one-year outcomes in 2,000 patients with COVID-19 infection and 500 family caregivers from the four hardest-hit provinces in Canada: Quebec, Ontario, Alberta, and British Columbia.
Research summary Results Study website

Saskatchewan SARS-CoV-2 Seroprevalence Protocol (Phase I/Retrospective- lab analysis only)

Maureen Anderson, University of Saskatchewan

This study aims to understand what proportion of the population in Saskatchewan has immunity to SARS-CoV-2 by geographic area, age group and sex, in order to establish the cumulative population immunity. Researchers are also examining how long immunity lasts and helping to target vaccination campaigns.
Research summary Results

Manitoba COVID Seroprevalence Study (MCS Study)

Derek Stein, University of Manitoba

This study will take blood samples from Manitobans every two to three months to provide up-to-date estimates of COVID-19 prevalence. It will measure seroprevalence in the general population in Manitoba by sex, age, and regional health authority, determine risk factors for infection and improve estimates of case fatality ratio.
Research summary Results



Rahul Arora, and TingTing Yan, University of Calgary

SeroTracker is a dashboard with data from SARS-CoV-2 serosurveillance projects from around the world. A Canada-only dashboard is also available. Many countries have invested in serosurveys to understand the true extent of the pandemic, identify groups at risk, monitor vaccine-induced immunity, and chart an exit strategy from the pandemic.

Research summary Results Study website

Immunity Passports for COVID-19: Scientific, Ethical, Policy and Design Implications

Kumanan Wilson, Bruyère Research Institute

Our study is evaluating the potential use of an immunity passport in Canada. We are examining the current international use and studying the specific implications for Canada. We will provide guidance on the potential design of an effective digital tool to manage immunity tracking, as the dynamic nature of the science is best suited to digital certification solutions.
Research summary Results

Biobanque québécoise de la COVID-19 (BQC19)

Vincent Mooser, McGill University

BQC19 is recruiting close to 5,000 individuals (children and adults) and collecting blood samples and clinical data to ensure that scientists have access to the biological materials and data necessary for their COVID-19 research. The biobank uses a network of universities and hospitals in Quebec and is part of larger biobank network in Canada and around the world.
Research summary Results