Used in research and diagnostic applications to detect and neutralize SARS-CoV (SARS-associated coronavirus). Binds specifically to the spike protein of SARS-CoV, blocking viral entry into host cells by interfering with receptor binding. Employed as a reference standard in neutralization assays to evaluate the efficacy of vaccines and antiviral drugs. Also used in immunoassays and ELISA to quantify antigen expression and assess immune responses. Serves as a critical tool for studying coronavirus pathogenesis and for developing therapeutic antibodies targeting similar viral strains.