While CD8+ T cells are required for selection of IFNγRKO over WT tumours, we unexpectedly found tumour growth to be significantly higher in all tumour types when tumours are engrafted in CD8ɑKO mice (Fig. 2M and Supplementary Fig. 2G), demonstrating that CD8+ T cells are still crucial for controlling IFNγRKO tumours. The gene discussed is CD8A; the disease is neoplasm.