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 is particularly effective in treating solid tumors such as non-small cell lung cancer, melanoma, and other malignancies where PD-1 pathway activation suppresses anti-tumor immunity. It is developed for use in immunotherapy regimens, often in combination with other checkpoint inhibitors or cancer treatments to improve clinical outcomes.