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. 2020 Apr 28;11:735. doi: 10.3389/fmicb.2020.00735

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Copyright © 2020 Ma, Liu, Yin, Qin, Zhou, Yang, Li, Poon and Zhang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Spatial diffusion of A/H1N1pdm virus. Thickness of lines represents supported migration rates: solid black arrows, decisive support with BF > 1000; dashed black arrows, very strongly supported with 100 < BF < 1000; solid gray arrows, strongly support with 10 < BF < 100; dashed gray arrows, support with 3 < BF < 10. In the phylogenetic tree, colored branches represent different regions. North China (NC), Northeast China (NEC), Northwest China (NWC), Central China (CC), East China (EC), South China (SC), and Southwest China (SWC).