Since an increased OVA‐specific CD8 T cell response in the combination group did not explain the therapeutic efficacy of the DCVacc/VSV‐GP treatment, we focused on the number and composition of leukocytes found in tumors, which has been shown to correlate with tumor prognosis.25, 26, 38, 39, 40, 41 Indeed, TILs, such as CD4 and highly activated CD8 T cells, were increased upon DCVacc/VSV‐GP treatment and were mainly directed against VSV‐GP. Here, CD8A is linked to neoplasm.