Pancreatic cancer, which affects about 60,000 Americans every year, is one of the deadliest forms of cancer. After diagnosis, fewer than 10 percent of patients survive for five years. While some chemotherapies are initially effective, pancreatic tumors often become resistant to them. The disease has also proven difficult to treat with newer approaches such as immunotherapy. However, a team of MIT researchers has now developed an immunotherapy strategy and shown that it can eliminate pancreatic tumors in mice. The new therapy, which is a combination of three drugs that help…