A new study identifies genetic modifications that make “natural killer” more effective at destroying cancer cells. Credit: NIAID Scientists have created a new and more advanced form of immune-based cancer therapy using engineered cells known as CAR-NK (natural killer) cells. Like CAR-T cells, these modified immune cells can be programmed to recognize and attack cancer, but they rely on a different type of immune cell that naturally targets abnormal or infected cells. A team from MIT and Harvard