Used to measure eotaxin-1 (CCL11) levels in human biological samples such as serum, plasma, or cell culture supernatants. This ELISA kit is widely applied in immunological research to study eosinophil recruitment and activation, particularly in allergic diseases like asthma, allergic rhinitis, and atopic dermatitis. It is also used in inflammation and autoimmune disease studies to understand chemokine involvement in disease progression. The kit enables accurate quantification of CCL11, supporting both clinical research and drug development targeting eosinophil-mediated conditions.