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. 2014 Mar 19;45(1):33. doi: 10.1186/1297-9716-45-33

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Copyright © 2014 Del Amo et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 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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Mean daily blood viral genome load (a) and viremia titres (b) plotted for four groups of eight house sparrows inoculated with different WNV strains. NY99 (open squares), Spain/2007 (closed circles), Italy/2009 (open triangles) and Italy/2008 (open circles). Birds were sampled every other day as described in the text. Error bars represent the standard error of the mean.