The novel coronaviruses belong to the βgenus. COVID-19 is an acute respiratory infectious disease. People are generally susceptible.  Currently, the patients infected by novel coronavirus are the main source of infection; a symptomatic infected people can also be an infectious source. Based on the current epidemiological investigation, the incubation period is 1 to 14 days, mostly 3 to 7 days. The main manifestation includes fever, fatigue and dry cough. Nasal congestion, runny nose, sore throat, myalgia and diarrhea are found in a few cases.