For his part, Eric Lander from the Broad Institute said in a December 1 presentation at the summit that the need to
employ germ line editing would remain very, very rare thanks to other already available reproductive technologies like in - vitro fertilization that could help most people.
So far, preventing disease by
employing CRISPR — Cas9 to alter the human
germ line — a human embryo, egg or sperm — has remained extremely controversial, due to concerns about unwittingly introducing errors or leaving stowaway unedited disease - causing mutations that would put future generations at risk of disease.