According to the query of Cainiu Health Network, common influenza detection methods include antigen detection, nucleic acid detection and serological detection. Among them, antigen detection is a direct detection of viral antigens in nasopharyngeal secretions, which usually takes about 30 minutes to get results, but there is a certain proportion of false negative rate. Nucleic acid detection requires the use of laboratory equipment, which can generally produce results within 2 hours, but it requires professional operation. Serological detection is to detect virus antibodies, which can generally produce results within 24 hours, but the detection time is longer.