Figure 1

Maximum likelihood phylogenetic trees of HA and NA segments.

(a) ML phylogenetic tree of HA segment, (b) ML phylogenetic tree of NA segment. Migratory birds H5N6 viruses reported in this paper are marked in red and the human-originating strain A/Sichuan/26221/2014 is marked in blue. Bootstrap values less than 50% are not shown.