The quote I have listed below is from a doctor I have mentioned previously: Dr. Keith Black--neurosurgeon. Dr. Black further explains, in his own words, what this vaccine does.
"Brain tumors evade the immune system to survive, and the vaccine is intended to alert the immune system to the existence of cancer cells and activate a tumor-killing response. We also are targeting cells that we believe generate and perpetuate cancers." (ScienceDaily, Keith Black)
The vaccine was noted to also attack brain cancer stem cells (which are considered to be the original source of tumors). These tumor cells are self-renewing and are known to resist radiation and chemotherapy. Also, they can regenerate after the treatments.
The trials for this vaccine began in 1998. It moved to Phase II in 2011. Now, in September of 2012, the enrollment (testing on actual patients) is said to be completed.
The article explained where and how many times the vaccine was injected. "When the "new" dendritic cells in the vaccine are injected under the patient's skin in the armpit, they are intended to seek and destroy lingering tumor cells. Vaccine is administered three times at two-week intervals after standard radiation and chemotherapy." (ScienceDaily)
After reading the article, I realized that this may be the same vaccine that I previously mentioned watching about on a video. This article has explained it better than the video did, so I greatly recommend reading it if the video from before was of any interest to you.
You can read the article here: Vaccine Targets Malignant Brain Cancer Antigens, Significantly Lengthens Survival.