Oh, they survived, if you play around with cute rodents in the right parts of the US West you can get yourself a nice case of the plague, look here for an excel

Oh, they survived, if you play around with cute rodents in the right parts of the US West you can get yourself a nice case of the plague, look here for an excellent map and more details on cases and deaths per year etc.: https://www.cdc.gov/plague/maps/ https://www.cdc.gov/plague/maps/ Of course, passing through humans for a half century, and then through these rodents, it won't be quite the same, but...