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Commentary

Understanding heterogeneity to inform the public health response to COVID-19 in Canada

Sharmistha Mishra, Jeffrey C. Kwong, Adrienne K. Chan and Stefan D. Baral
CMAJ June 22, 2020 192 (25) E684-E685; DOI: https://doi.org/10.1503/cmaj.201112
Sharmistha Mishra
MAP Centre for Urban Health Solutions (Mishra), Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Unity Health Toronto; Department of Medicine (Mishra), St. Michael’s Hospital, University of Toronto; Institute of Health Policy, Management and Evaluation (Mishra), Dalla Lana School of Public Health, University of Toronto; ICES (Kwong); Department of Family and Community Medicine (Kwong), University of Toronto; Dalla Lana School of Public Health (Kwong), University of Toronto; Division of Infectious Diseases (Chan), Department of Medicine, Sunnybrook Health Sciences Centre; Division of Clinical Public Health, and Institute of Health Policy, Management and Evaluation (Chan), Dalla Lana School of Public Health, University of Toronto, Toronto, Ont.; Department of Epidemiology (Baral), Johns Hopkins University, Baltimore, Md.; Li Ka Shing Knowledge Institute (Baral), St. Michael’s Hospital, Toronto, Ont.
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Jeffrey C. Kwong
MAP Centre for Urban Health Solutions (Mishra), Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Unity Health Toronto; Department of Medicine (Mishra), St. Michael’s Hospital, University of Toronto; Institute of Health Policy, Management and Evaluation (Mishra), Dalla Lana School of Public Health, University of Toronto; ICES (Kwong); Department of Family and Community Medicine (Kwong), University of Toronto; Dalla Lana School of Public Health (Kwong), University of Toronto; Division of Infectious Diseases (Chan), Department of Medicine, Sunnybrook Health Sciences Centre; Division of Clinical Public Health, and Institute of Health Policy, Management and Evaluation (Chan), Dalla Lana School of Public Health, University of Toronto, Toronto, Ont.; Department of Epidemiology (Baral), Johns Hopkins University, Baltimore, Md.; Li Ka Shing Knowledge Institute (Baral), St. Michael’s Hospital, Toronto, Ont.
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Adrienne K. Chan
MAP Centre for Urban Health Solutions (Mishra), Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Unity Health Toronto; Department of Medicine (Mishra), St. Michael’s Hospital, University of Toronto; Institute of Health Policy, Management and Evaluation (Mishra), Dalla Lana School of Public Health, University of Toronto; ICES (Kwong); Department of Family and Community Medicine (Kwong), University of Toronto; Dalla Lana School of Public Health (Kwong), University of Toronto; Division of Infectious Diseases (Chan), Department of Medicine, Sunnybrook Health Sciences Centre; Division of Clinical Public Health, and Institute of Health Policy, Management and Evaluation (Chan), Dalla Lana School of Public Health, University of Toronto, Toronto, Ont.; Department of Epidemiology (Baral), Johns Hopkins University, Baltimore, Md.; Li Ka Shing Knowledge Institute (Baral), St. Michael’s Hospital, Toronto, Ont.
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Stefan D. Baral
MAP Centre for Urban Health Solutions (Mishra), Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Unity Health Toronto; Department of Medicine (Mishra), St. Michael’s Hospital, University of Toronto; Institute of Health Policy, Management and Evaluation (Mishra), Dalla Lana School of Public Health, University of Toronto; ICES (Kwong); Department of Family and Community Medicine (Kwong), University of Toronto; Dalla Lana School of Public Health (Kwong), University of Toronto; Division of Infectious Diseases (Chan), Department of Medicine, Sunnybrook Health Sciences Centre; Division of Clinical Public Health, and Institute of Health Policy, Management and Evaluation (Chan), Dalla Lana School of Public Health, University of Toronto, Toronto, Ont.; Department of Epidemiology (Baral), Johns Hopkins University, Baltimore, Md.; Li Ka Shing Knowledge Institute (Baral), St. Michael’s Hospital, Toronto, Ont.
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  • RE: Understanding heterogeneity
    Brian M. Cornelson [MD]
    Posted on: 03 June 2020
  • Posted on: (3 June 2020)
    RE: Understanding heterogeneity
    • Brian M. Cornelson [MD], family physician, University of Calgary

    The authors make a persuasive argument, but who are they trying to persuade? Health care providers are clear that population heterogeneity is a major factor in many conditions, COVID-19 being only the most recent example. Alas, as they clearly state, good data ain't cheap. Successive provincial and national governments have neglected if not hamstrung public health, despite "lessons learned" from SARS in 2003. We are now paying the piper. Will governments learn this time, now that they're spending orders of magnitude more to deal with their short-sightedness. The next challenge will be persuading voter-sensitive governments to enact interventions that reflect this heterogeneity. Will they be ready to defend more restrictions in the poorer crowded downtown parts of cities where people take public transit to work--if they work--while allowing more freedom in the wealthy suburbs where self-isolation is the norm and people drive to their jobs? Heterogeneity is only part of the problem; government short-sightedness is at least equally culpable.

    Competing Interests: None declared.

    References

    • Sharmistha Mishra, Jeffrey C. Kwong, Adrienne K. Chan, et al. Understanding heterogeneity to inform the public health response to COVID-19 in Canada. CMAJ 2020;10.1503/cmaj.201112.
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Canadian Medical Association Journal: 192 (25)
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Vol. 192, Issue 25
22 Jun 2020
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Understanding heterogeneity to inform the public health response to COVID-19 in Canada
Sharmistha Mishra, Jeffrey C. Kwong, Adrienne K. Chan, Stefan D. Baral
CMAJ Jun 2020, 192 (25) E684-E685; DOI: 10.1503/cmaj.201112

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Understanding heterogeneity to inform the public health response to COVID-19 in Canada
Sharmistha Mishra, Jeffrey C. Kwong, Adrienne K. Chan, Stefan D. Baral
CMAJ Jun 2020, 192 (25) E684-E685; DOI: 10.1503/cmaj.201112
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