Figure 3

Phylogenetic analysis of HA and NA segments from the four H7N9 positive samples among three confirmed cases. A: HA; B: NA. Notation: Red color strains noted the isolates from three family cluster cases, 2014 while the blue color noted the isolates from the two sporadic confirmed cases in Zhejiang province, in 2013. A/Anhui/1/2013 was H7N9 vaccine candidate isolate in this 8 segments.