[jonrick46]

What is the source of this plague? Border jumpers bringing it up with their dogs?

[IYAS9YAS]

Border jumpers bringing it up with their dogs?

Actuslly, no. Trade ships from China from the late 1800s/early 1900s. Plague actually spread out from San Francisco.

[verum ago]

What is the source of this plague? Border jumpers bringing it up with their dogs

I see you already have a reply explaining it came over from China over a century ago, but just to clarify a little further:

plague is now endemic to many of the west coast / great basin states. The native ground squirrels have become a geographically vast natural reservoir, and people catch it every year.

Fortunately, modern antibiotics are highly effective against it.

It’s funny you mention dogs, because they’re commonly involved in American plague cases: the dog interacts with a rodent, a flea carrying plague goes from rodent to dog, then gets from dog to person back at home…