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. 2014 May 2;9(5):e95911. doi: 10.1371/journal.pone.0095911

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© 2014 Xu 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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. The contour lines of the fraction of susceptible individuals with respect to time steps with (a) r ranging from 0.1 to 0.9; (b) q ranging from 0.3 to 1.0; (c) ranging from 1.0 to 3.0.

Inline graphic — . The contour lines of the fraction of susceptible individuals with respect to time steps with (a) r ranging from 0.1 to 0.9; (b) q ranging from 0.3 to 1.0; (c) ranging from 1.0 to 3.0.