IL2 and neoplasm: Since activated T-killers, the number of which was increased after cultivation with CIMVs-IL2, are able to destroy cancer cells [78], including breast cancer cells [79], we believe that a higher number of activated T-killers after incubation with CIMVs-IL2 had a stronger cytotoxic effect on MDA-MB-231 cells and could cause the death of a higher number of tumor cells.