Caution is essential. "Given the safety, ethical and other considerations, gene therapy on human embryos is still considered" out of bounds. "So far, only the somatic cell technique of gene therapy has been applied, and mostly for diseases against which medical technology is otherwise powerless.
基於安全、倫理等種種考量，胚胎基因治療目前依然是不可觸犯的禁忌地帶，各國都只限於在個體的體細胞做，而且多用在目前醫學科技無法克服的疾病上。