Genetically modified immune cells may be capable of finding and destroying blood cancer cells, according to the results of a small clinical trial. The study, published in Science Translational Medicine, was conducted on five patients with acute lymphoblastic leukemia. T-cells were extracted from the patients, genetically engineered and reinjected into their bodies. The immune cells quickly eradicated the disease. Scientists say the next step is to conduct multi-center clinical trials before the immunotherapy could be introduced to the mainstream.