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. 2018 Aug 20;15:131. doi: 10.1186/s12985-018-1043-2

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© The Author(s). 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 5 — Phylogenetic tree based on 73 envelope gene sequences of DENV-2 strains. Each strain was abbreviated as the GenBank accession number followed by the country and year of isolation. The numbers at the nodes revealed bootstrap support for that node (bootstrap replications was 1000). The DENV-2 sequenced in this study is marked with a solid circle (●), and the strains isolated from Yunnan Province of China in 2013 are marked with solid diamonds (◆). The envelope gene sequence of DENV-1 (US/Hawaii/1944, AB609588) was used to root the tree