Baby KJ Muldoon, the first patient to successfully receive personalized CRISPR gene editing therapy has returned home after ...

After spending over 300 days at the Children’s Hospital of Philadelphia (CHOP), 9-month-old KJ Muldoon has been released from the hospital after receiving personalized CRISPR gene editing therapy.

Nine-month-old KJ Muldoon is the first patient to successfully receive personalized CRISPR gene editing therapy. After 300 ...

Nine-month-old KJ Muldoon is the first patient to successfully receive personalized CRISPR gene editing therapy. After 300 days in the hospital, baby KJ has returned home.

Editor’s note: On June 3, 2025, KJ Muldoon was discharged from the hospital and is now at home with his family. When a baby born in Philadelphia was announced as the first person to get a gene ...