FLT3LG and neoplasm: Further, i.t. IFNAR-blockade at the time of NDV injection (Supplementary Fig. 8e) significantly reduced the effects of Flt3L+NDV on tumor growth and survival (Fig. 7h), despite similar numbers of circulating anti-GFP CD44+PD1+ CD8+ T cells (Supplementary Fig. 8f), suggesting that IFN I signaling plays a complementary role to cDC1-mediated anti-tumor T cell priming.