Stimulating the body’s immune system to attack tumors is a promising way to treat cancer. Scientists are working on two complementary strategies to achieve that: taking off the brakes that tumors put on the immune system; and “stepping on the gas,” or delivering molecules that jumpstart immune cells. However, when jumpstarting the immune system, researchers have to be careful not to overstimulate it, which can cause severe and potentially fatal side effects. A team of MIT researchers has now developed a new way to deliver a stimulatory molecule called IL-12…
