After contact with humans, the new coronavirus generally undergoes an incubation period of 1-14 days, with an average of 3-7 days to cause appropriate clinical symptoms. Some studies suggest that the incubation period may be extended, but it is now generally recognized that the incubation period is 1-14 days, with an average of 3-7 days, and there is some controversy about whether the incubation period is infectious. Recently, there are studies suggesting that the virus may be discharged from the body when the patient is asymptomatic, which needs to be given due attention, but we do not want to cause everyone to be self-protective because of the possibility of viral discharge during the incubation period. If there is close contact with the patient, if he has ever traveled to an infected area in less than 14 days or has returned to his current residence from a high prevalence area or has ever gathered a group of people in a feverish situation, he should do a good job of self-isolation, and the general public should do a good job of taking precautionary measures. Source: Dr. Yurai