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. 2018 Apr 13;18:176. doi: 10.1186/s12879-018-3070-4

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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. 4 — Estimates of environmental site sensitivity for detection of serotype 1 WPV for each district included in the analysis. The number of sites per district varies from 1 to 3. 95% CI are indicated by the vertical lines