Whether there are carriers of novel coronavirus pneumonia is a statement that is currently open to debate. Novel coronavirus pneumonia is currently in an epidemic phase, and there are different statements about the different stages of disease infection, including confirmed cases, suspected cases, and incubation cases. If one is infected with novel coronavirus but has no associated symptoms, he or she may be in the latent phase or may be a mildly ill patient. It is true that a portion of the population infected with novel coronavirus has relatively mild symptoms but can excrete the virus; it is not true that the absence of any symptoms necessarily means that the virus will not be excreted. Therefore, the general population is exposed to patients who may not have fever or cough and should not be taken lightly, and should be protected when having close contact with anyone. Content source: Dr. Yurai