Currently, novel coronavirus infection cannot be detected by blood tests, but blood tests in novel coronavirus-infected patients show normal or reduced total white blood cell counts and a reduced percentage of lymphocytes. The diagnostic methods used today to confirm the diagnosis of novel coronavirus are real-time fluorescent RT-PCR for positive novel coronavirus nucleic acid, or sequencing of the viral gene with a high degree of homology to a known novel coronavirus. Blood tests currently do not confirm the diagnosis of novel coronavirus infection, but blood tests for antibodies to the novel coronavirus are currently available as an indirect response to whether the patient is infected with the novel coronavirus or whether protective antibodies have been developed following vaccination against the novel coronavirus. During a novel coronavirus epidemic, the diagnosis is confirmed by epidemiological history, clinical presentation, and nucleic acid testing of neo-coronavirus in nasopharyngeal swabs or oropharyngeal swabs.