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. 2021 Dec 6:1–4. doi: 10.1017/ice.2021.495

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© The Author(s) 2021

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means subject to 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. — Non–SARS-CoV-2 respiratory virus positivity over the 2018–2019, 2019–020, and 2020–2021 respiratory seasons (through epidemiologic week 22), from Calgary and Edmonton Zones, Alberta, Canada. The vertical axis represents the percent positivity for samples submitted for non-SARS-CoV-2 respiratory virus testing. Vertical lines indicate the start of each respiratory virus surveillance season (ie, 2019 week 1 (2019-1); 2020 week 1 (2020-1); and 2021 week 1 (2021-1).