PDCD1 and neoplasm: Mice treated with (MS@OVAinMOF)@(polyICinMOF) plus a high dose of i.p. anti-PD-1 (group i) show a higher survival rate and a smaller tumour volume, than those treated with free OVA plus a high dose of i.p. anti-PD-1 (group a), only free OVA (group b), OVAonMS plus a high dose of i.p. anti-PD-1 (group g), and OVA/polyIConMS plus a high dose of i.p. anti-PD-1 (group h).