G47Δ virus enhances the ability to induce anti-tumor immunity is a virus for the treatment of genetically modified cancer. It is a modified Herpes simplex virus (HSV-1). A γ34.5 gene and the ICP6 gene necessary for viral DNA synthesis are deleted. The number of patients with malignant glioma in Japan is 3,500.

Daiichi Sankyo news release, July 11, 2017