Novel coronavirus pneumonia is caused by coronavirus. By understanding other coronaviruses including SARS and MERS, it is believed that their physicochemical properties should be the same, and the virus is resistant to cold but not heat, and may survive for a long time at about 4°C, and may remain active for a longer time at about -8°C. By its observation, it is found that 30 minutes of heating at 56℃ can make the virus nucleic acid structure completely destroyed, that is, the virus dies. If it is heated to 100℃, generally 2-20 minutes can make the virus structure completely destroyed. In clinical or practical life, it is not required that the virus be completely killed, as long as it is not infectious. Generally if at room temperature of 20°C, it may take 4-5 hours for the virus to lose its infectiousness. If well ventilated, saliva and respiratory secretions with the virus have dried thoroughly and are not infectious. The virus itself cannot survive and replicate outside the body and will die on its own and lose its infectiousness even without taking any measures. It is sufficient to avoid close respiratory contact. If the virus is present on the surface of an object, it may take 4-5 hours for the virus to completely lose its infectiousness. Content source: Dr. Yurei