A pharyngeal swab is considered positive if novel coronavirus nucleic acid is detected in the pharyngeal swab specimen. Pharyngeal swab sampling is obtained by swabbing the upper respiratory tract specimen with a disposable swab of the bilateral pharynx, tonsils, and posterior pharyngeal wall, and is one of the sampling methods used for novel coronavirus nucleic acid testing, and the pharyngeal swab sample is tested by RT-PCR. It should be noted that a positive pharyngeal swab is not equivalent to a confirmed diagnosis of novel coronavirus, nor is it equivalent to infection with a new coronavirus. Such a result is only indicative of the presence of a new coronavirus in the body, and given the possibility of a false positive pharyngeal swab test, at least two samples with a positive pharyngeal swab at an interval of 24 hours or more are required to identify a person infected with the virus.