The first infant to undergo gene-editing therapy has accomplished another first — his first steps. KJ Muldoon is walking and ...

A baby born with a rare genetic disorder has taken his first steps after receiving a groundbreaking, personalized gene ...

The baby saved from a rare disease by a first-ever personalized gene fix has reached a big milestone, taking his first steps ahead of Christmas. KJ Muldoon is walking and getting ready to celebrate ...

A miracle baby who was treated with a pioneering gene-therapy at CHOP has reached a major milestone as he took his first ...

One mom writes: "How is it that the few hours this month that he’s with my mother-in-law are when he actually takes his first steps?" Virginia Chamlee is a Politics Writer at PEOPLE. She has been ...