Medicine: Against Polio

A promise of cures or preventives for infantile paralysis has backfired so often that researchers are gun-shy. But this week a team of scientists at Johns Hopkins*—Drs. Isabel M. Morgan, Howard A. Howe and David Bodian—guardedly reported a new polio vaccine which, in trials on monkeys, has performed better than any other so far.

The vaccine, consisting of live virus, is not ready to be tried on human beings. But in its monkey tests it has been 100% successful: after four shots of the vaccine (into the muscles), monkeys proved immune to thousands of times the lethal dose of polio. Their immunity...

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