Novel coronavirus pneumonia is currently in the epidemic stage of the disease. The understanding of novel coronavirus pneumonia disease is also in the process of gradual exploration and continuous awareness. In general, it is believed that novel coronavirus pneumonia will develop after an incubation period of 1-14 days after receiving the virus, and more commonly it will develop in 3-7 days, there are some reports that its incubation period can be appropriately extended, but most patients may be in 1-14 days, mainly in 3-7 days for onset. Therefore, if there is a suspicious contact or return to a new place after the return trip, it is important to do a good job of home isolation for 14 days. Within the 14-day period, generally if there is contact there will be related disease manifestations, so generally speaking the current recommendation for home isolation is still 14 days. Content source: Dr. You Lai