Medicine: Jungle Yellow Jack

The Indians of Panama used to say:

"When the monkeys die, the men will vomit black"—and die themselves, of yellow fever. Then came Gorgas and Goethals, and for 40 years the country seemed free of the scourge. Doctors believed that they had banished it entirely from the Americas; they scoffed at the Indian legend about the monkeys.

But all the time yellow jack was lurking in the jungles. The dread mosquito carriers spread yellow fever from animal to animal, and from animals to the few men who ventured deep into the forests. The doctors...

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