Replicative oncolytic vaccinia virus derived from the Copenhagen strain, genetically modified by inactivation of its thymidine kinase (TK) and ribonucleotide reductase (RR) genes and by addition of genes encoding for the human granulocyte-macrophage colony-stimulating factor (hGM-CSF) cytokine and for a monoclonal antibody targeting the Cytotoxic T-Lymphocyte-Antigen 4 (CTLA-4).
Engineered replicative oncolytic vaccinia virus (VV) derived from the Copenhagen strain. It contains three genetic modifications: 1) deletion of the viral thymidine kinase (TK) gene, 2) deletion of the viral ribonucleotide reductase (RR) gene and 3) insertion of the chimeric yeast FCU1 suicide gene in the TK locus.