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. 2015 Sep 22;15:940. doi: 10.1186/s12889-015-2235-y

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© Le Viet et al. 2015

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 — Map of Cat Ba Island, Hai Phong. Cat Hai insular district (including Cat Hai and Cat Ba islands) is highlighted by hatches (a); Dengue incidence rate by district (2009–2012) (b) and Location of floating houses (c)