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. 2016 Mar 22;13:49. doi: 10.1186/s12985-016-0477-7

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© Arafa et al. 2016

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. 1 — Phylogenetic analysis of H5N1 in Egypt during the period 2006–2014. The original viruses of clade 2.2.1 are marked in blue, while the cluster 2.2.1.2 clade which originated from 2.2.1 are marked in green. The variant clade 2.2.1.1 is divided into two clusters (2.2.1.1) marked in red and (2.2.1.1a) marked in pink. The genetic diversity has been illustrated on an annual scale