Randomly ask 30 laboratory personnel or professionals with relevant experience to read the instruction manual, randomly select sufficient products from different models and batches of products to be tested, and then ask them to test the samples to be tested according to the method of the instruction manual, carry out measurement and interpretation respectively, and the organizer is responsible for judging whether the judgment results are effective. Finally, according to the judgment of professionals, calculate the proportion of correctly using and interpreting products. Test time: 2020.05-06.5.2 Inspection method (see product manual for details)5.3 test requirements:The test result of negative specimen should be negative;The test result of S1-S4 should be positive.