Medicine: Immunity & Cancer

A growing chain of evidence indicates that a mysterious kind of immunity protects most people against cancer. Newly forged links in the chain, reported in Chicago last week by investigators at Manhattan's Sloan-Kettering Institute:

ΒΆ Ohio Penitentiary volunteers (TIME, Feb. 25) who had already sloughed off one injection of cancer cells threw off a second injection of the same kind of cells still more rapidly, reported Dr. Chester Southam. Evidently their original immunity had been increased by the first exposure. When they got a third injection of cells of a different type, they rejected it,...

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