Replimune Group Inc is a clinical-stage biotechnology company. It uses a proprietary RPx platform to design and develop product candidates that are intended to maximally activate the immune system against solid tumors. The RPx platform is based on a proprietary, engineered strain of herpes simplex virus 1, or HSV-1, backbone with payloads added to maximize immunogenic cell death and the induction of a systemic anti-tumor immune response. The company focuses on developing oncolytic immunotherapies for the treatment of cancer. Its pipeline products include RP1, RP2, and RP3.