Dengue diagnosis is primarily based on clinical symptoms and can be confirmed through laboratory tests such as PCR (Polymerase Chain Reaction), ELISA (Enzyme-Linked Immunosorbent Assay), and NS1 antigen detection. There is no specific antiviral treatment for dengue; management focuses on supportive care, including hydration, pain relief, and monitoring for complications. Severe cases may require hospitalization for intravenous fluids and blood transfusions.