Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Inferred migration graph for SEOV in China (A) and around the world (B) and its reflection of the vents reconstructed from the MCC tree. The maps are based on satellite pictures made available in Google Earth (http://earth.google.com; doi:10.1371/journal.pcbi.1000520.g007).
