ERBB2 and neoplasm: We show here that LLC1-ERBB2 established tumour model is also resistant to immunotherapy (i.e. PD-1 checkpoint blockade), but it can become susceptible to treatment when retargeted oHSVs are administered in combination with immune checkpoint inhibitors or is potentiated by immunostimulatory cargoes (i.e. mIL-12) (D’Alise et al., submitted).