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. 2015 Dec 31;94(52):e2399. doi: 10.1097/MD.0000000000002399

FIGURE 3.

FIGURE 3

Phylogentic analysis of HA gene of influenza B-Yamagata lineage virus from severe acute respiratory infection and influenza-like illness cases. The phylogenetic trees were constructed using BEAST program and employing the general-time reversal HKY substitution model/strict clock model with a gamma-distributed rate parameter. The viruses isolated from severe acute respiratory infection cases were shown in red, and the vaccine strains were shown in blue. HA-Y3/NA-V4 reassortants were marked in yellow.