PTPRC and neoplasm: The expression levels of both MHC-I (H-2Kb/H-2Db) and MHC-II (I-A/I-E) were significantly increased in the stained tumor sections (Fig. 2g) from mice received the BNT162b2 intratumoral injections, which was supported by a significant increase in the MHC-II (I-A/I-E)-positive population in CD45– tumor cells detected by flow cytometry (Fig. 2g).