Medicine: Pure but Practical

"There is a great period of darkness in our understanding of what this tiny gangster does when he enters the body. He disappears for about 14 days after he enters the body and before he shows up in a living cell. It may be that a knowledge of his movements in that two weeks' spree will lead to some method of blocking his entrance. . . ."

So last week declared Dr. William Charles White of the National Institute of Health addressing the National Tuberculosis Association in Boston. The hiding gangster he spoke of was...

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