Medicine: Furtive First

Genetic jump from mice to man

Just this past spring, scientists at U.C.L.A. announced that they had inserted foreign genes into the bone-marrow cells of mice, the first attempt at using new genetic-engineering techniques with living animals. But experiments on humans, experts said, were still years away. Not so. Last week it was disclosed that the great divide between research in mouse and in man had been quietly crossed.

In July, U.C.L.A. Hematologist Martin Cline and colleagues at Jerusalem's Hadassah Hospital on Mount Scopus and at a clinic of the University of Naples performed...

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