Sneezing and runny nose are clinical manifestations of upper respiratory tract infection. The respiratory tract is divided into upper and lower respiratory tracts, and the new coronavirus pneumonia mainly refers to the inflammation of the lungs, i.e., lower respiratory tract infection, so the upper respiratory tract symptoms are not obvious, i.e., sneezing and runny nose are more inclined to be the symptoms of the common cold. Because winter and spring are the most common seasons for colds, there may be patients with sneezing and runny nose, which are not similar to new coronavirus pneumonia in terms of clinical symptoms. Source: Dr. Yurai