A second mouse SCLC allograft model with more prominent T-cell infiltration (KP3) responded similarly to radiotherapy and CD47 blockade in immunocompetent syngeneic hosts and T-cell-deficient NSG hosts (Fig. 3d,e and Extended Data Fig. 2c–e), further indicating that T cells are not required for the observed abscopal effects in the context of CD47 blockade. Here, CD47 is linked to small cell lung carcinoma.