Medically, there can be no question that this is an amazing development of science. The possibility of wiping out thousands of genetic conditions and preventing suffering in countless people is incredible.
The ethical question is much more difficult. Where do you stand on this issue? Is it ok to change the genetic code of embryos? Equally, is it ok to stand back and let genetic conditions be passed to new generations when there is the technology available to prevent it?
Darren Griffin, professor of genetics at the University of Kent, said: "...the biggest question, and probably the one that will be debated the most, is whether we should be physically altering the genes of an IVF embryo at all. "This is not a straightforward question... equally, the debate on how morally acceptable it is not to act when we have the technology to prevent these life-threatening diseases must also come into play." The study has already been condemned by the campaign group Human Genetics Alert, which described the research as "irresponsible" and a "race for first genetically modified baby". Dr Yalda Jamshidi, a reader in genomic medicine at St George's University of London, said: "The study is the first to show successful and efficient correction of a disease-causing mutation in early stage human embryos with gene editing."