In order to further optimize the new crown virus detection strategy, the comprehensive group of the joint prevention and control mechanism of the State Council recently decided to add antigen detection as a supplement to nucleic acid testing. Compared with nucleic acid detection, antigen detection can be faster and more convenient to operate, but the accuracy is lower, and it is generally used in the early stages of infection. On March 15, Zhang Chen, assistant director of the Department of Medical Laboratory Medicine, CuHK Hospital affiliated to Southeast University, demonstrated the method of antigen detection.
According to the "Application Plan for Antigen Detection of the New Coronavirus (Trial)" that has been formulated and issued, the applicable groups of antigen testing are: first, those who go to primary medical and health institutions for treatment, accompanied by respiratory tract, fever and other symptoms and have symptoms within 5 days; second, isolation and observation personnel, including home isolation observation, close and sub-close connection, entry isolation observation, sealing and control areas and control areas; third, community residents with antigen self-testing needs.
On March 15, at the Zhongda Hospital affiliated to Southeast University, Zhang Chen washed his hands and prepared for sample collection. Photo by Xinhua News Agency reporter Ji Chunpeng
On March 15, at the Zhongda Hospital affiliated to Southeast University, Zhang Chen blew his nose before the sample was collected. Photo by Xinhua News Agency reporter Ji Chunpeng
On March 15, at the Zhongda Hospital affiliated to Southeast University, Zhang Chen took a nasal swab sample. Photo by Xinhua News Agency reporter Ji Chunpeng
On March 15, at the Zhongda Hospital affiliated to Southeast University, Zhang Chen eluteed the swab after sampling. Photo by Xinhua News Agency reporter Ji Chunpeng
On March 15, at the Zhongda Hospital affiliated to Southeast University, Zhang Chen performed the dosing step and dripped the liquid vertically into the test card dosing hole. Photo by Xinhua News Agency reporter Ji Chunpeng
On March 15, at the Zhongda Hospital affiliated to Southeast University, Zhang Chen showed a negative result. The test results should be interpreted within the specified time. A red band appears at the viewing window C, and the band is not displayed at T, which is a negative result; a red band appears at both C and T, and the band at T can be deep or shallow, which is a positive result; a red band is not displayed at C, and whether there is a band at T is an invalid result and should be retested. Photo by Xinhua News Agency reporter Ji Chunpeng