Used in biomedical research to detect and quantify interferon-lambda (IFN-λ) in human samples such as serum, plasma, and cell culture supernatants. This ELISA kit enables researchers to study the role of IFN-λ in immune responses, particularly in viral infections like hepatitis, influenza, and SARS-CoV-2. It is widely applied in immunology and virology studies to assess cytokine production, evaluate antiviral activity, and monitor disease progression or therapeutic responses. The assay provides high sensitivity and specificity, making it suitable for clinical research and drug development where precise measurement of IFN-λ levels is critical.