“A baby boy with a devastating genetic disease is thriving after becoming the first known person to receive a bespoke, CRISPR therapy-for-one, designed to correct his specific disease-causing mutation. Little KJ Muldoon, now nearly ten months old, is doing well after receiving three doses of a gene-editing treatment to mend a mutation that had impaired his body’s ability to process protein, his parents told reporters this week. But it is too soon to use the word ‘cure’, says Rebecca Ahrens-Nicklas, a pediatrician at Children’s Hospital of Philadelphia in Pennsylvania, and one of Muldoon’s physicians. ‘This is still really early days,’ she says. ‘We know we have more to learn from him.’”