Dengue NS1 (Non-Structural Protein 1) ELISA (Enzyme-Linked Immunosorbent Assay) is a diagnostic test used to detect the presence of the dengue virus NS1 antigen in a patient's blood serum. Dengue is a viral infection transmitted by Aedes mosquitoes and is prevalent in many tropical and subtropical regions around the world. Early and accurate diagnosis of dengue is crucial for patient management and timely treatment.