New coronavirus is a new type of coronavirus. After infection, this virus has a certain incubation period, usually 1~14 days, mostly 3~7 days. New coronavirus infection can lead to new coronavirus pneumonia, referred to as new coronavirus pneumonia, which can be transmitted through droplet transmission, contact transmission and other ways. Based on current epidemiologic investigations, this virus has a certain incubation period (i.e., it may not develop immediately after infection), which is usually 1-14 days, mostly 3-7 days. It should be noted that the disease is contagious during the incubation period, but it is generally more contagious 1~2 days before and 5 days after the onset of the disease. Daily attention should be paid to personal hygiene protection, once the fever, dry cough, fatigue and other suspected symptoms of new crown pneumonia, should also be timely medical treatment. Tip: “New coronavirus pneumonia” and “new coronavirus pneumonia” mentioned in this article were renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.