x’g The infectiousness of asymptomatic infections varies from person to person, with the greater the amount of virus excreted by the infected person, the more infectious they are. Asymptomatic patients with new coronavirus pneumonia are those who have positive nucleic acid test results, but do not have clinical signs such as fever and cough, and have normal results on CT scan of the chest, which are also infectious. The infectiousness of asymptomatic patients with C.pneumoniae is usually determined by the amount of toxins excreted by the patient. The patient’s detoxification can usually be judged according to the CT value of the nucleic acid test, in general, the lower the CT value, the higher the viral load in the infected body, the greater the detoxification, and the more contagious it is; on the contrary, the contagiousness is lower. The prevention and treatment of new coronavirus pneumonia requires the participation of all people, and active cooperation with the relevant policies of the prevention and control departments. Tip: In this article, the terms “new coronavirus pneumonia” and “new coronavirus pneumonia” were renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.