Jennifer Matthews: Prostate cancer patients like Bob Anderson not only battle cancer, they also battle the side effects of treatments like chemotherapy. Bob Anderson: In addition to killing the cancer cells, it also kills your red blood cells, your white blood cells. Jennifer Matthews: And often, it kills energy. Bob used to play tennis, ski and hike. Bob Anderson: All of those things are impacted to the point where I just generally am not able to participate in them anymore. Jennifer Matthews: Now a new vaccine could eliminate those draining side effects. Researchers from Duke University removed immune cells from cancer patients, sensitized them to the cancer and re-injected them into the patients` bloodstream. There, they activated other immune cells to attack. Dr. Johannes Vieweg: The miracle is that these cells only attack cancer cells, but not normal cells so I think we have a very specific and targeted therapy which has no side effects whatsoever. Jennifer Matthews: Doctors say the vaccine may not eliminate the cancer altogether, but may keep it from spreading. Dr. Johannes Vieweg: In the next decade I think we will find improvements to these strategies and completely tackle the cancer puzzle and hopefully can cure patients in the future. Jennifer Matthews: Just the prospect for an easier treatment is enough for Bob. Bob Anderson: Even if it only lasted for a short period of time and didn't actually cure the cancer, but allowed my body to recover, would allow me to maintain, you know, a reasonable lifestyle. Jennifer Matthews: This is Jennifer Matthews reporting.