Used to measure interleukin-15 (IL-15) levels in human biological samples such as serum, plasma, or cell culture supernatants. It is commonly applied in immunology research to study immune system activation, inflammation, and autoimmune diseases. The kit helps in monitoring IL-15 in conditions like rheumatoid arthritis, multiple sclerosis, and cancer immunotherapy studies. It enables researchers to assess the role of IL-15 in T cell and NK cell proliferation and function. Widely used in clinical labs and pharmaceutical development for biomarker validation and therapeutic monitoring.