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.
The edge width is proportional to the number of individual hosts involved (numbers correspond to the number of rats sharing the parasites). The node size is proportional to the number of hosts infected (prevalence).
