John Mumm is a serial biotechnology entrepreneur who, as a young researcher, demonstrated the importance of the cytokine, interleukin -10 (IL-10), in activating the immune system to destroy tumors. That research led to the use of Pegylated IL-10 to treat patients with pancreatic cancer and other solid tumors through his work at ARMO Biosciences, a company he founded and was later acquired by Eli Lilly in 2018.