The current findings suggest that pneumonia from novel coronavirus infection is transmitted mainly through respiratory droplets and aerosols. In addition, it is transmitted through the mucous membranes by touching the respiratory secretions of the patient, such as sputum or nasal mucus, and then touching the eyes, mouth, or nasal mucosa. If one has not even touched the coronavirus, the risk of infection is extremely low. However, there is also a possibility of aerosol transmission, sharing central air conditioning or living in a room where a person with the new coronavirus has lived, there is also a certain possibility of being infected, so during the epidemic it is best to avoid going out and isolate at home.