The 2018 announcement in China by He Jianqui who genetically altered human embryos via CRISPR—producing twins known as Lulu and Nana—helped strengthen policies about germline gene editing. Despite the worldwide scorn leveled against him for conducting a brazen act of human experimentation, his research also helped usher in a more moderate point of view regarding the manipulation of germline genes. Policy makers followed with a softer tone in guidelines on the feasibility of research involving the genes of heredity. As it turned out, a bourgeoning number of scientists were expressing interest in developing potential cures by manipulating genetic sequences in germline DNA.
