Fig. 2From: Debate on the compositions of influenza B in northern hemisphere seasonal influenza vaccinesProportions of influenza B/Victoria and Yamagata lineages in northern hemisphere from December 2016 to February 2018. VC, influenza B/Victoria lineage; YM, influenza B/Yamagata lineage. Curves in this figure reflected the rising (YM) and falling (VC) trends from December 2016 to February 2018 in northern hemisphere. In addition, the inflexions of these curves generally occurred between April and MayBack to article page