New coronavirus can be detected by blood sampling. New coronavirus can be detected by viral nucleic acid testing through blood sampling, and a positive nucleic acid test is considered to be a new coronavirus infection. Since RNA is the first to appear after virus infection, antibodies can generally appear after 14 days, so the nucleic acid test is a very effective way to determine whether a patient has a novel coronavirus infection and to treat the patient early through early detection. In addition, nucleic acid testing for novel coronavirus can be performed by nasopharyngeal swabs or sputum, or by alveolar lavage fluid of the lower respiratory tract.