An official website of the United States government
Here's how you know
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.
Incidence of plague in mice injected intradermally with 96 CFU of Y. pestis 195/P (filled circles) or 150 CFU of the isogenic aceA mutant Y. pestis MacP (open circles).