A short but great book came out last year called Black Death at the Golden Gate that explores the epidemic(s) of plague in turn-of-the-century San Francisco, and how epidemiological efforts to study and fight it were hamstrung by local press and government officials viciously opposed to every measure the proto-CDC health service tried to impose. It ends on an ominous note, noting the likelihood that the bacterium persists in East Bay rodents and could strike again without warning.

https://www.amazon.com/Black-Death-Golden-Gate-America/dp/03...