other experimental work on additional breast cancer vaccines is ongoing. Researchers in Italy have developed a breast cancer vaccine that stimulates the immune system to attack a protein called mammoglobin-A, which is found in 80% of breast cancer tumors (Narayanan et al.,2004; Quaglino, 2004). In preliminary experiments in mice bred to develop the HER2/neu breast cancer gene, the vaccine prevented 48% of the mice from developing the disease. Researchers want to conduct clinical trials on those women who are at very high risk for breast cancer or who have relapsed after treatment.