Why can't the antigen screening cloud log in?

Network delay or network signal difference. Try to change the location and reopen it, or turn off the network and reopen it, and then reopen the healthy cloud. Detection method: the antigen detection method is simple, easy to operate, convenient and quick to use at home, and the results can be obtained in 15 minutes. However, nucleic acid testing must be carried out in the laboratory and operated by professional testing personnel. The detection method is relatively complex, professional, time-consuming and produces slow results. Accuracy of test results: The antigen is novel coronavirus's shell, and the corresponding antigen is detected with antibody coated with test paper. If the amount of antigen is small, it is not easy to have a positive result.