The incubation period of novel coronavirus pneumonia may be asymptomatic. The incubation period is the stage in the process of disease transmission and refers to the entire period of time from the invasion of the pathogen into the body to the earliest appearance of clinical symptoms in the body. The length of the incubation period varies from infectious disease to infectious disease and is related to the number of pathogens in the organism. If the number is relatively large, and the pathogen is more virulent or reproductive, the incubation period may be relatively short; if they are weaker and the incubating organism is more resistant, the incubation period may be long, but for the same disease, there is often a relatively fixed incubation period. For the new coronavirus, the incubation period of most patients is 3-7 days, some patients can have an incubation period as short as 1 day, some can reach a maximum of 14 days, there are also reports that can reach more than 20 days. The reason it is called the incubation period, i.e. the period when no early symptoms appear, makes it difficult to detect whether a patient is actually infected with novel coronavirus pneumonia, as medical attention may not be sought at all during this time. Content source: Dr. Arigato