ABSTRACT
Coronavirus disease 2019(COVID-19) is pneumonia caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2), which causes tens of millions of infections and millions of deaths worldwide. The initial symptoms of COVID-19 are very similar to "severe cold", which is often treated with "influenza". This is more common in European and American countries, resulting in a large number of infected people losing the best opportunity for treatment, and thus become a virus disseminator. This paper summarized the clinical symptoms, patient classification and diagnosis of coronavirus disease(COVID-19), with a view to rapidly distinguish common influenza and 2019 coronavirus disease(COVID-19) in clinical practice, and to achieve effective isolation and symptomatic treatment for patients, so as to achieve early prevention, early detection and early treatment, reduce mortality and improve the recovery rate.