We evaluated the expression of PD-L1 on viable proliferating control MMC cells (Ki67+), without (Untreated) and with IFN-γ (Untreated → IFN-γ) treatment, as well as on viable dormant tumor cells without (+ADR) and with IFN-γ (+ADR → IFN-γ) treatment. Here, MKI67 is linked to neoplasm.