Application segmentation delineates the IVD Antibody market into four functional clusters: infectious disease diagnostics, oncology diagnostics, cardiovascular diagnostics, and autoimmune disease diagnostics. Infectious disease testing, encompassing viral and bacterial antigen detection, remains the largest application, representing approximately 40 % of market volume due to sustained demand for rapid point‑of‑care assays. Oncology diagnostics, which rely on tumor‑associated antigen profiling, follows with a 30 % share, propelled by precision‑medicine initiatives and companion‑diagnostic approvals. Cardiovascular diagnostics, focused on biomarkers such as troponin and BNP, contributes 20 % of revenue, reflecting growing prevalence of heart‑failure screening programs. Autoimmune disease diagnostics, targeting auto‑antibodies like ANA and anti‑CCP, occupies the remaining 10 %, limited by niche patient populations but benefiting from increasing awareness of early detection. This application‑level market taxonomy aligns with the chartData below, illustrating the proportional impact of each segment on overall market size.