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. 2010 Jul 20;4(7):e757. doi: 10.1371/journal.pntd.0000757

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Ty Hang 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 relative proportion of sampled DENV-2 viruses belonging to either Asian I or Asian/American genotypes (as determined in Fig. 3) is shown by year of sampling in A) Viet Nam, B) Cambodia and C) Thailand. The values below the graph represent the number of E gene sequences sampled per year.