DNA of human embryos edited in USA successfully for world first.

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Researchers have demonstrated they can efficiently improve the DNA of human embryos.

https://www.technologyreview.com/s/608350/first-human-embryos-edited-in-us/?set=608342

The first known attempt at creating genetically modified human embryos in the United States has been carried out by a team of researchers in Portland, Oregon, MIT Technology Review has learned.

But Mitalipov and his colleagues are said to have convincingly shown that it is possible to avoid both mosaicism and “off-target” effects, as the CRISPR errors are known.