Like an army besieged is the human body. Around it lie fortifications of epidermis. Microbic attackers which penetrate this wall are pounced on by battalions of defenders in the blood and lymph. But there is one gap opening on a shortcut to General Headquarters (the brain). To the autumn meeting of the National Academy of Sciences at Cambridge. Mass, last week (see p. 50) Dr. Simon Flexner, director of Manhattan's Rockefeller Institute for Medical Research, reported that Institute researchers confirmed the widely accepted theory that this pathway is traveled by one of mankind's...
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