Doctors use gene editing tool Crispr inside body for first time

It may take up to a month to see outcome of attempt to treat inherited form of blindness

Scientists say they have used the gene editing tool Crispr-Cas9 inside a person’s body for the first time, a new development in efforts to operate on DNA to treat diseases.

A patient recently underwent a procedure at the Casey Eye Institute at Oregon Health & Science University in Portland for an inherited form of blindness, the companies that make the treatment announced on Wednesday. They would not give details on the patient or when the surgery occurred.

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