The screening methods for dengue fever are: 1. Detection of dengue antigen: the main method to confirm the diagnosis in endemic areas is the detection of dengue antigen, i.e., MSE antigen test; 2. Detection of dengue virus: another method to confirm the diagnosis, dengue virus RNA nucleic acid test is carried out; 3. Dengue antibody: the detection of dengue antibody is the means to quickly screen for dengue fever. For patients who suspect dengue fever, it is recommended to test the blood routine, and at the same time test the antigen test of dengue, and for patients who have fever for more than 3 days, test the antibody test of dengue at the same time.