Consistent with a specific involvement of CD8+ T cells in controlling the growth of IFNγRKO tumours, quantification of lymphocyte tumour infiltration by flow cytometry revealed no overt differences except for an increase in OVA-specific CD8+ T cells in IFNγRKO and admix tumours (Fig. 2N and Supplementary Fig. 2H), as assessed by OVA-tetramer staining. This evidence concerns the gene CD8A and neoplasm.