Last summer the nation was excited by the invention of two vaccines to protect children against infantile paralysis (TIME, July 16; Aug. 27). There remained to be invented a simple, speedy way of finding out what children are susceptible to infantile paralysis and therefore need such vaccine.
Last week, in ample time for the regular summer season of infantile paralysis, Dr. Maurice Brodie of Manhattan, one of the vaccine inventors, disclosed a simple, speedy test of a child's susceptibility to the disease. A mouse and a special filtrate, which any careful bacteriologist...
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