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. 2017 Aug 7;216(6):697–702. doi: 10.1093/infdis/jix393

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© The Author 2017. Published by Oxford University Press for the Infectious Diseases Society of America.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 1. — Median age by influenza B lineage (A) and percentage distribution of influenza B cases by lineage and season (B), Canadian Sentinel Practitioner Surveillance Network, 2010–2011 to 2015–2016. *Sequencing and lineage-specific reverse-transcription polymerase chain reaction assay were not conducted on influenza B detections during the 2010–2011 season; lineage-level characterization was based only upon hemagglutination inhibition assay among isolates submitted to Canada’s National Microbiology Laboratory, accounting for a greater proportion of viruses with unknown lineage that season.