It was Shenzhen scientist He Jianku's revelation at a conference of the world's leading geneticists that led to a universal outcry. His claim to have altered the genes of twin baby girls to enable them to resist future HIV infection. It led to pioneers in genetics to call for a five year moratorium on altering the genes of babies.
Harvard Professor David Liu did not mince words. He said, "It's an appalling example of what not to do with a new technology."
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