Influenza viruses are weak, lose their infectiousness quickly at room temperature, survive for weeks at 0-4°C, and are not heat-resistant and can be inactivated at 56°C in 30 minutes. Influenza viruses include human influenza viruses and animal influenza viruses. The human influenza virus is the causative agent of human influenza and is divided into three types: A (A), B (B), and C (C). Influenza virus viral body structure includes the viral genome and proteins composed of nucleocapsid and envelope, these proteins have a fine high-level structure, such as protein coiled folding, electrostatic interaction between each other. Generally, the higher the temperature, the shorter the inactivation time, which is due to the high temperature of the virus protein high-level structure is destroyed, protein denaturation and thus caused by the virus inactivation. Influenza virus is not heat-resistant and can be inactivated at 56°C for 30 minutes. Influenza virus is sensitive to chemical reagents such as ether, formaldehyde, sunlight, drying and ultraviolet light, and these methods can also be used to inactivate influenza virus.