Pancreatic cancer is especially challenging to treat—only eight percent of patients are still alive five years after diagnosis. Chemotherapy and radiation therapy are of limited benefit, and even immunotherapy—which revolutionized treatment for other kinds of cancer by activating the body's immune system to attack cancer cells—has been largely ineffective because pancreatic tumors have ways to dampen the immune assault.
source https://www.lifetechnology.com/blogs/life-technology-news-blog/immune-boosting-compound-makes-immunotherapy-effective-against-pancreatic-cancer