VENEZUELA: Men in Green

Along the malarial marshes and through the tropical lowland jungle ride Venezuela's green-uniformed soldiers of health. From their gaudy yellow trucks they dismount at the doorways of palm-thatched huts to spray walls and dark corners with DDT-guns. In two years of spraying, the malaria fighters have cleared the mosquito from 200,000 houses and all but wiped out malaria in one-third of the nation.

The campaign got started almost by chance. In the spring of 1945, Venezuela's chief malaria expert, young Arnoldo Gabaldon, was in Washington for a Pan-American health conference. At lunch one day, Dr. James Stevens (now dean of...

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