Immune cells from 1 of the 5 tumor-bearing and tumor-cured mice showed a more than 2-fold increase in IFN-γ production in response to HER2780–788 compared with the response to the control peptides, and none of the immune cells from the tumor-bearing and tumor-cured mice showed a more than 2-fold change in IFN-γ production in response to HER2440–448 or HER2907–915 compared with the response to the control peptides. Here, IFNG is linked to neoplasm.