4/25/2013

This article uses a series of maps to chart reported cases of the H7N9 virus and determine where it might spread in the future. The first case was reported at the end of March in China, and there were 104 confirmed infections as of April 22. Eastern China is a nexus of airline travel, so the virus could spread to population centers on other continents if it is capable of sustained human-to-human transfer, researchers said.

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