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. 2015 Nov 11;6(4):17–23. doi: 10.5365/WPSAR.2015.6.1.022

Table 1. Number of influenza B lineage isolates included for phylogenetic analysis, northern Viet Nam, 2007–2014 (n = 64).

Year Number of influenza B isolates selected for haemagglutinin gene analysis
Victoria lineage Yamagata lineage Total
2010 3 2 5
2011 14 8 22
2012 7 7 14
2013 4 4 8
2014 11 4 15
Total 39 25 64