Medicine: Malaria Secret

"Here is something startling. I am going to knock on wood . . . because it is still in the experimental stage." New York City's Mayor Fiorello LaGuardia, on his weekly broadcast, then announced that the city's Public Health Research Institute had succeeded in immunizing laboratory animals against certain kinds of malaria parasites, a feat many experts believed impossible.

The work was directed by Dr. Jules Freund, 54, hygienist with the Austrian Army in World War I, and assistant professor of pathology at Cornell. The U.S. Army & Navy, hopeful that the discovery may lead to a vaccine which will lick World...

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