Used to detect and quantify TLR3 (Toll-like receptor 3) activity in human biological samples such as serum, plasma, or cell culture supernatants. Commonly applied in immunology research to study innate immune responses, particularly in viral infection models, as TLR3 plays a key role in recognizing viral double-stranded RNA. Helps assess the effectiveness of antiviral drugs, vaccine development, and inflammatory disease mechanisms including autoimmune disorders. Provides a reliable, high-throughput method for measuring TLR3 expression levels in clinical and research settings.