Every once in a while we hear of a “miracle” cancer treatment testing successfully on mice in labs only to never hear about it taking the next step in treating humans. Recently however, one of those treatments delivered its intended purpose. In London, one-year-old Layla Richards became the first person in the world to have her leukemia reversed by having genetically modified immune cells injected into her. Using microscopic scissors known as Talens, scientists redesigned the immune cells of a donor to seek out and kill leukemia cells. Now just months after Layla was diagnosed with incurable cancer, she has no trace of leukemia in her body. Her doctors call it “almost a miracle”. The treatment could potentially lead the way to other conditions being treated through gene-editing technology.