He Jiankui guides a laboratory staff member at the Direct Genomics lab in Shenzhen,  China. The scientist has claimed to have  created the world’s first gene-edited twin baby girls, ‘Lulu’ and ‘Nana’, whose genetic alterations could make them immune to HIV. Photograph: VCG via Getty Images

News that Chinese scientist He Jiankui successfully applied new gene-editing technology to create genetically modified human embryos immune to the HIV(...)