(From Science Daily). Cancer is one of the biggest obstacles to healthy life extension amongst the common age-related conditions. The good news is that development of cancer vaccines - a form of immunotherapy that reprograms the immune system to attack cancer cells - is progressing nicely: "A team from the University of Pennsylvania School of Medicine has shown that by using [a cancer vaccine] they can cure mice with established breast tumors. ... We found that we can stop the tumor from growing out to 100 days, at which time we stopped measuring since this is a long time for experiments of this type. The tumors stopped growing or went completely away." The wider field of immune therapy is moving forward at a similar pace, as progress towards vaccines for Alzheimer's demonstrates.