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. 2013 Jul 2;8(7):e68537. doi: 10.1371/journal.pone.0068537

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This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

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Mean viremia titers of WNV infected American robins. The number of individuals with detectable viremia compared to the number of individuals inoculated is indicated next to each dose in the legend. Titers were determined by plaque assay with 1.7 Log₁₀ PFU/mL as the threshold of detection. Error bars represent standard error.