Chinese researcher He Jiankui is now world-famous for having announced the creation of genetically-modified twins that would be resistant to HIV. He said that he edited the genomes of these twins with CRISPR/Cas9, a technology that makes it possible to target specific genes within a living organism. Everywhere, scientists and non-scientists alike reacted with astonishment. Most comments were negative, but not all were critical of gene editing per se.
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