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Figure 2. Evolutionary Relationships Among Influenza A(H7N9) virus hemagglutinin (HA) genes.
  • Published Date:
    December 16, 2016
  • Source:
    Xiang N, Li X, Ren R, Wang D, Zhou S, Greene CM, Song Y, Zhou L, Yang L, Davis CT, Zhang Y, Wang Y, Zhao J, Li X, Iuliano AD, Havers F, Olsen SJ, Uyeki TM, Azziz-Baumgartner E, Trock S, Liu B, Sui H, Huang X, Zhang Y, Ni D, Feng Z, Shu Y, Li Q. Assessing change in avian influenza A (H7N9) virus infections during the fourth epidemic — China, September 2015–August 2016. MMWR Morb Mortal Wkly Rep. 2016 Dec 16;65(49):1390-1394
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  • Description:
    Amino acid differences shown on the branches and tips of the phylogenetic tree indicate changes compared with Anhui/1/2013, a candidate vaccine virus. Mature H7 HA numbering (numbering not including the HA signal peptide) was used. Sequences in bold represent fourth epidemic viruses and remaining sequences represent viruses circulating in the first, second and third epidemics.

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