A boy named Hassan, whose whole body looked like an open wound because of a genetic condition that led his skin to be paper-thin, had a skin sample taken in Germany, its DNA repaired, and the modified skin cells grown to make skin grafts totaling 0.85 sq m, and he now leads a normal life. In 2015, doctors used these grafts to replace about 80% of his epidermis damaged by junctional epidermolysis bullosa. By late 2017 his new genetically modified skin was functioning normally with no sign of blistering.
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