Used to measure levels of human gamma interferon (IFN-γ) in biological samples such as serum, plasma, or cell culture supernatants. It is commonly applied in immunology research to study immune responses, particularly T-cell and natural killer cell activity. The kit helps in diagnosing and monitoring infectious diseases, autoimmune disorders, and cancer by quantifying IFN-γ, a key cytokine involved in inflammation and immune regulation. It is also used in vaccine development and clinical trials to assess immune system activation.