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. 2011 Dec 22;34(2):195–202. doi: 10.1093/pubmed/fdr088

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This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

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Fig. 1 — Data sources used by organizations to monitor the epidemiology of 2009 pandemic H1N1 and inform decision-making, Ontario. *Other includes EMS/paramedic activities, hospital admission, intensive care unit and ventilator use data, immunization visits, influenza assessment centre visits and provincial surveillance bulletins and teleconferences.