LONDON (AP) — Doctors treating a critically ill boy with a devastating skin disease used experimental gene therapy to create an entirely new skin for most of his body in a desperate attempt to save his life.

Two years later, the doctors report the boy is doing so well that he doesn't need any medication, is back in school and even playing soccer.

"We were forced to do something dramatic because this kid was dying," said Dr. Michele De Luca of the University of Modena in Italy, who got a call for help from the German doctors treating the boy.

The boy, then 7, was hospitalized in June 2015 with...