The novel coronaviruses (SARS-CoV-2) belong to the~genus. COVID-19 is an acute respiratory infectious

disease. People are generally susceptible. Currently, the patients infected by the novel coronavirus are the main

source of infection; asymptomatic 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 manifestations

include fever, fatigue and dry cough. Nasal congestion, runny nose, sore throat, myalgia and diarrhea are found

in a few cases.