'Twould Be Irresponsible Not To Speculate

A question is raised in reference to this map:

A map shows reported cases of human plague in the United States from 1970 to 2012.
Nearly all cases occur in the western U.S., for reasons that are not entirely understood.
Plague first came to the U.S. in 1900 via rats on steamships from Asia.

Lawrence said ...

Is there a potential carrier species that has a habitat range that resembles the red area?

15 September, 2015 10:22

ifthethunderdontgetya™³²®© said ...

Mormons?
~

15 September, 2015 13:07

Let's go to the videotape (or equivalent):

Mmmm ... probably not, but there is overlap.