Rather than editing the gene out, Dr. John Tisdale says his team added a copy of the normal correct gene which produced healthy blood cells.

约翰·蒂斯代尔博士说，他的研究小组没有对病变基因进行编辑，而是添加了一份正常的正确基因的副本，该基因可以产生健康的血细胞。