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Open Access
Peer-reviewed
Research Article
Factors associated with severe COVID-19 outcomes among adults with at least a primary vaccination schedule: A retrospective cohort study from Alberta, Canada
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Sylvia Aponte-Hao ,
Roles Conceptualization, Data curation, Formal analysis, Visualization, Writing – review & editing
¶‡ These authors are co-first authors on this work.
Affiliation Data and Research Services, Alberta SPOR SUPPORT Unit Data Platform, Calgary, Alberta, Canada
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Huong Luu ,
Roles Conceptualization, Methodology, Validation, Writing – review & editing
¶‡ These authors are co-first authors on this work.
Affiliation Real World Evidence Unit, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
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Karen J. B. Martins,
Roles Conceptualization, Writing – original draft, Writing – review & editing
Affiliation Real World Evidence Unit, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
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Jason R. Randall,
Roles Conceptualization, Project administration, Writing – review & editing
Affiliation Real World Evidence Unit, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
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Lynora Saxinger,
Roles Conceptualization, Writing – review & editing
Affiliations Department of Medicine, University of Alberta, Edmonton, Alberta, Canada, Department of Microbiology and Immunology, University of Alberta, Edmonton, Alberta, Canada
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Elissa Rennert-May,
Roles Conceptualization, Writing – review & editing
Affiliations Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada, Department of Microbiology, Immunology, and Infectious Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada, O’Brien Institute for Public Health, University of Calgary, Calgary, Alberta, Canada, Department of Medicine, University of Calgary, Calgary, Alberta, Canada
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Jenine Leal,
Roles Conceptualization, Writing – review & editing
Affiliations Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada, Department of Microbiology, Immunology, and Infectious Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada, O’Brien Institute for Public Health, University of Calgary, Calgary, Alberta, Canada, Infection Prevention and Control, Alberta Health Services, Edmonton, Alberta, Canada
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Tyler Williamson,
Roles Conceptualization, Writing – review & editing
Affiliations Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada, O’Brien Institute for Public Health, University of Calgary, Calgary, Alberta, Canada, Centre for Health Informatics, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada, Libin Cardiovascular Institute, Department of Cardiac Science, University of Calgary, Calgary, Alberta, Canada, Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
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Amanda Wilson,
Roles Conceptualization, Writing – review & editing
Affiliation Moderna, Cambridge, Massachusetts, United States of America
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Michelle Blake,
Roles Conceptualization, Writing – review & editing
Affiliation Moderna, Cambridge, Massachusetts, United States of America
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Tianyi Lu,
Roles Conceptualization, Writing – review & editing
Affiliation Moderna, Cambridge, Massachusetts, United States of America
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Shehzad M. Iqbal,
Roles Conceptualization, Writing – review & editing
Affiliation Moderna, Cambridge, Massachusetts, United States of America
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James A. Mansi,
Roles Conceptualization, Writing – review & editing
Affiliation Moderna, Cambridge, Massachusetts, United States of America
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Andre B. Araujo,
Roles Conceptualization, Writing – review & editing
Affiliation Moderna, Cambridge, Massachusetts, United States of America
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David Martin,
Roles Conceptualization, Writing – review & editing
Affiliation Moderna, Cambridge, Massachusetts, United States of America
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Scott W. Klarenbach
Roles Conceptualization, Funding acquisition, Supervision, Writing – review & editing
* E-mail: swk@ualberta.ca
Affiliations Real World Evidence Unit, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
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Factors associated with severe COVID-19 outcomes among adults with at least a primary vaccination schedule: A retrospective cohort study from Alberta, Canada
- Sylvia Aponte-Hao,
- Huong Luu,
- Karen J. B. Martins,
- Jason R. Randall,
- Lynora Saxinger,
- Elissa Rennert-May,
- Jenine Leal,
- Tyler Williamson,
- Amanda Wilson,
- Michelle Blake
- Published: August 17, 2026
- https://doi.org/10.1371/journal.pone.0354822