Medical experiments on humans

IN 2010, THE FEDERAL government funded 55,000 experiments worldwide on human subjects. Ethical and operational controls adopted over four decades have eradicated the most abominable experiments, such as those in which U.S. researchers infected unwitting Guatemalans with sexually transmitted diseases during the 1940s. But the sheer number of ongoing projects and the absence of a centralized record-keeping system argue for additional safeguards.

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