The appropriate clinical symptoms usually appear after an incubation period of approximately 1-14 days following exposure to novel coronavirus pneumonia. The vast majority of patients have an incubation period of 1-14 days, with 3-7 days being common. Whether there is a prolonged incubation period needs to be further investigated. The incubation period is usually followed by fever, cough, dyspnea, and chest pain. Fever is the most common manifestation, but it should be noted that some patients with novel coronavirus pneumonia do not have fever. However, it is important to note that some patients with novel coronavirus pneumonia do not have fever, i.e., there is a possibility of developing novel coronavirus pneumonia without fever after exposure to the virus. Epidemiologic history, clinical manifestations and relevant laboratory results should be used to make a comprehensive judgment. Source: Dr. Yurai