In order to preliminarily define the main immune characteristics of the CT26-HER2 tumors and compare them to those of the previously employed LLC1-HER2 tumors [6,25], we performed a transcriptional analysis of 92 immune-related genes (Table S1) in CT26-HER2 and LLC1-HER2 tumor specimens (Figure 2A). Here, ERBB2 is linked to neoplasm.