Fig. 4.
Spatial distribution of severe and death cases in mainland China, May 2009–21 March 2010. Numbers indicate number of severe cases and number of death cases, respectively.
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.