Correct. (Well, the other hookworm, A. duodenale, is present around the Mediterranean. Necator Americanus, "the American killer", is from Africa.)
I read about it on a blog, but it looks like there's some good discussion of the history in https://www.amazon.com/Parasites-Tales-Humanitys-Unwelcome-G...
One of the things I find most interesting about the whole N. Americanus affair is that hookworm was a public health disaster of colossal proportions, and the medical research that recognized it was a big, important advance... but medical treatment for the problem is mostly irrelevant. The (very successful) "medical" intervention that solved this problem was just convincing people to wear shoes.
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