Used in the treatment of various cancers by enhancing the body's immune response against tumor cells. It works by blocking the PD-1 receptor on T-cells, preventing cancer cells from evading immune detection. This antibody has shown efficacy in treating solid tumors, including non-small cell lung cancer, melanoma, and other advanced or refractory cancers. It is administered intravenously and is being investigated in combination with other immunotherapies to improve clinical outcomes. Its use supports long-term anti-tumor immunity and can lead to durable responses in a subset of patients.