The viruses of our company originate from the world's largest repository of pathogenic microorganisms and the National Microbial and Virus Strain Preservation Center, with a comprehensive range of virus types and subtypes. The viral strains are authenticated by authoritative microbial strain and virus strain preservation centers, ensuring compliance with regulatory requirements for production processes and traceability information, and are stably supplied. All inactivated pathogens undergo infectivity tests on cultured cells and are accompanied by a Certificate of Analysis (COA) to ensure safety and non-infectiousness. Pathogenic microorganisms can be cultured to high concentrations and quantified via TCID50 and qPCR.*Due to frequent inventory changes or additions, please consult our customer service for the availability of in-stock products.