In one study, 94 percent of participants suffering from acute lymphoblastic leukemia (ALL) said their symptoms vanished completely after they were treated with the modified blood cells, known as T-cells. Non-Hodgkin’s lymphoma patients responded also positively. “This is unprecedented in medicine to be honest, to get response rates in this range in these very advanced patients,” said lead researcher Professor Stanley Riddell from the Fred Hutchinson Cancer Research Center in Seattle. For the instant, it’s not clear how long the symptom-free patients will remain in remission. On the other part, reprogramming of the immune system can be itself a dangerous action for the human body. A few number of patients required intensive care after suffering an immune reaction. Treating patients suffering from cancers with solid tumors it’s another problem which requires advanced research.