Used in immunological research to quantify CD4 molecule levels in pig samples, this ELISA kit enables accurate measurement of CD4 expression in serum, plasma, or cell culture supernatants. It is widely applied in veterinary research, vaccine development, and infectious disease studies, particularly in monitoring immune responses in swine models. The assay supports investigation of T-cell activity and immune system modulation in porcine health and disease, including studies on viruses like PRRSV or influenza. Its high sensitivity and specificity make it suitable for preclinical and diagnostic research in animal health laboratories.