Sino Biological specializes in antibody development and recombinant protein production. All of Sino Biological's products are independently developed and produced. Sino Biological offers pharmaceutical companies and biotechnology firms a variety of recombinant production and assay services for pre-clinical research development work. Sino Biological is dedicated to virology and infectious disease research. Its ProVirTM collection is the world's largest viral antigen bank, carrying over 800 products from 350 strains of viruses. Sino Biological is the first company in the world to produce and supply the SARS-CoV-2 viral protein reagents . To support the development of immunodiagnostic assay, Sino Biological has developed a comprehensive collection of antigens and antibodies for SARS-CoV-2.