The rapid test for novel coronavirus infection (colloidal gold method) has a high accuracy, but there is a possibility of false negatives (i.e., missed diagnosis), and its results are for clinical reference only and should not be used as the sole basis for confirming the diagnosis of novel coronavirus infection, and further nucleic acid testing is recommended to confirm the diagnosis in case of a positive test result.
Colloidal gold assay analyzes whether the body produces antibodies against the New Crown virus to determine whether the person is infected with the New Crown virus. A positive result indicates that antibodies are present in the body, while a negative result indicates that antibodies have not yet been produced in the body. Since it takes time for the body to mount an immune response, a person who has just been infected with the new coronavirus may not yet have produced the appropriate antibodies, and therefore there is a possibility of false negatives (i.e., missed diagnosis).