Age-Related Differences in Influenza B Infection by Lineage in a Community-Based Sentinel System, 2010–2011 to 2015–2016, Canada

Summary Age-related differences in influenza B lineage infection were assessed by the community-based Canadian Sentinel Practitioner Surveillance Network between 2010–2011 and 2015–2016. Influenza B(Victoria) cases were on average 20 years younger than B(Yamagata) cases, with the latter showing a bimodal age distribution.
Age-related differences in influenza B lineage detection were explored in the community-based Canadian Sentinel Practitioner Surveillance Network (SPSN) from 2010–2011 to 2015–2016. Whereas >80% of B(Victoria) cases were