Used in research settings to quantify Interleukin-28B (IL-28B) protein levels in biological samples such as serum, plasma, and cell culture supernatants. This kit enables scientists to study the role of IL-28B in immune responses, particularly in viral infections like hepatitis C, where IL-28B expression is linked to disease progression and treatment outcomes. It supports investigations into cytokine signaling, antiviral defense mechanisms, and therapeutic response prediction. Widely applied in immunology, virology, and biomedical research for accurate and sensitive detection of IL-28B without cross-reactivity to other cytokines.