6 Differential Diagnosis

6.1 The mild manifestations caused by COVID-19 should be distinguished from respiratory infections caused by other viruses.

6.2 NCP should be distinguished from viral pneumonia caused by influenza virus, adenovirus or respiratory syncytial virus, and mycoplasma pneumonia. Especially for suspected cases, rapid antigen detection, multiple PCR nucleic acid test and other methods should be adopted to examine common respiratory pathogens.

6.3 In addition, differentiation from non-infectious diseases such as vasculitis, dermatomyositis, and organizing pneumonia should also be performed.