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. 2012 Jun 13;7(6):e39075. doi: 10.1371/journal.pone.0039075

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Lin et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Neutralizing activity in sera collected from immunized mice was determined by measuring (A) HI and (B) NT titers against the A/Vietnam/1194/2004 (clade 1) H5N1 virus, and (C) HI and (D) NT titers against the A/Whooper Swan/Mongolia/244/2005 (clade 2.2) H5N1 virus. For calculation purposes, an undetectable level was scored as titer = 1. Individual titers (points) and geometric means (lines) are given for each group. Asterisks indicate statistical significance at p<0.05.