According to the fifth edition of the “Pneumonia Treatment Protocol for Novel Coronavirus Infection”, the diagnosis of novel coronavirus pneumonia is confirmed in the following ways: 1. RT-PCR: that is, reverse transcription polymerase chain reaction, which is used to detect the nucleic acid of the virus for nucleic acid amplification. The diagnosis can be confirmed by checking the presence of viral nucleic acid in the patient’s blood and pharyngeal swab, if the test is positive; 2. Detection of viral gene sequence: if highly homologous, the diagnosis can also be confirmed. 3. A new clinical diagnosis case has been added in Wuhan. The so-called clinical diagnosis case refers to although not confirmed by nucleic acid, but there is a history of close contact, such as fever and other clinical as well as CT performance, can be considered a confirmed case. Nucleic acid kits may have problems of sensitivity, specificity, testing allegations, sample collection, etc., so in addition to nucleic acid sequencing and nucleic acid testing and sequencing, clinical diagnostic cases were added in Wuhan. Content source: Dr. You Lai