The novel coronaviruses belong to the genus β. They are enveloped, with round or oval, often polymorphic, particles, 60-140 nm in diameter, and are so named because of their coronal appearance. the S protein is located on the surface of the virus and forms a rod-like structure, which is one of the main antigens of the virus and is the main structure used for typing, and the N protein wraps around the viral genome and can be used as a diagnostic antigen. When isolated and cultured in vitro, the new coronavirus can be found in the epithelium of the human respiratory tract in about 96 hours. The virus is sensitive to ultraviolet light and heat, and can be effectively inactivated by 56°C for 30 minutes, ether, 75% ethanol, chlorine-containing disinfectants, lipid solvents such as peroxyacetic acid and chloroform, and chlorhexidine is not effective in inactivating the virus.