A two-bar test for Neocollins antigen with fever is usually indicative of a Neocollins infection, and if other pathogens are tested for antigen, then the same is true for the corresponding pathogen. During the current epidemic of the new crown virus, the new crown virus antigen can be detected by test strips, and can be detected at home, if there is a two-bar test generally suggests that the new crown antigen is positive, and if the fever, then it can be clear that the new crown virus infection, it is recommended to immediately go to the hospital isolation treatment, the test of the new crown virus nucleic acid clear. If it is the antigen test of other pathogens, such as HIV antigen, Hepatitis B virus antigen test, and so on. If the antigen test of these pathogens shows two bars and fever symptoms, it is also suggestive of related pathogen infections and should be treated in the hospital as soon as possible. For these signs of a two-bar antigen test and fever, it is recommended to go to a fever clinic for further diagnosis and treatment.