
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 the holiday season at home with his parents and three siblings.
KJ was born last year with a genetic disorder called carbamoyl-phosphate synthetase 1 deficiency. Also known as CPS1 deficiency, the metabolic condition affects only 1 in 1.3 million babies and often leads to life-threatening outcomes.
When he was 6 months old, doctors began giving KJ a groundbreaking new treatment -- a personalized CRISPR gene editing therapy at Children's Hospital of Philadelphia.
Doctors save baby's life with first-ever gene fix for deadly rare disease
The gene-editing therapy works like a "molecular spell-checker,” finding and fixing the specific genetic error causing his condition.
After three infusions and after spending the first 10 months of his life in a hospital, KJ was discharged and sent home in June.
Baby saved by gene-editing therapy 'graduates' from hospital, goes home
Since then, KJ has continued to grow and thrive with his family, celebrating his first birthday at home and taking part in one of the family’s favorite rituals -- cheering for their beloved Philadelphia Eagles.
Doctors hope new technology like CRISPR gene-editing therapies can be the key to treating more than 7,000 rare diseases, such as sickle cell disease, cystic fibrosis, Huntington’s disease and muscular dystrophy, that affect approximately 30 million people across the country.
LATEST POSTS
- 1
Independence from the rat race for Recent college grads: Systems and Tips - 2
Must-See Attractions in Washington, D.C. - 3
Step by step instructions to Think about Disc Rates Across Various Banks - 4
'Euphoria' Season 3 trailer includes Eric Dane's final appearance, Jacob Elordi and Sydney Sweeney at the altar and Rue's 'Breaking Bad' era - 5
Roman around the Christmas tree | Space photo of the day for Dec. 25, 2025
Surveys of Thrillers That Re-imagined the Class
Would you ever turn to AI for companionship? 6% of Americans say they could — or already have.
German finance minister sees advantages of smartphones in schools
Giant ‘toothed’ birds flew over Antarctica 40 million to 50 million years ago
Tire Brands for Senior Drivers: Guaranteeing Security and Solace
Wegovy maker Novo sharpens consumer focus with board role for Mars CEO
Pick Your #1 Sort Of Espresso
Vote In favor of Your #1 Method for diminishing Pressure
6 Methods for further developing Rest Quality













