Fig 3. Statistical calculation of HFRS cases within the changed urbanization area from 2005 to 2018 for Xi’an.
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.