In this photo provided by Oregon Health & Science University, taken July 31, 2017, Shoukhrat Mitalipov, left, talks with research assistant Hayley Darby in the Mitalipov Lab at OHSU in Portland, Ore. Mitalipov led a research team that, for the first time, used gene editing to repair a disease-causing mutation in human embryos, laboratory experiments that might one day help prevent inherited diseases from being passed to future generations. (Kristyna Wentz-Graff/Oregon Health & Science University via AP)
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