Medicine: Polio at Work

Doctors have long believed that the polio virus creeps along the nerves, on its way to destroying the nerve cells. Last week, for the first time, the virus was caught in the act. Drs. Eduard De Rober-tis and Francis Otto Schmidt of M.I.T. showed a Toronto convention of the Electron Microscope Society of America some remarkable pictures of the polio virus marching in orderly files along a nerve fiber.

The sight was cheering medical news to every polio fighter. Said one doctor: "Once we can see a thing, we can study it; and when we know how it operates, we are usually...

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