In the last few years, it is estimated that in Europe there were almost 3 000 000 cancer cases diagnosed (excluding non melanoma skin cancers) and more than 1 500 000 deaths from cancer each year [2] . Standard therapeutic procedures currently in practice, including surgery, radiation, and chemotherapy have not greatly impacted the spread and recurrence of progressive malignancies [3] , reducing the ability of the immune system to provoke "spontaneous" regressions. Newer strategies are needed to improve upon the current treatment success rate.