Poster reporter Zhuang Binbin reported from Shanghai
After nucleic acid screening in key areas in Shanghai, some communities have been released from control after 48 hours, while others have not. Continue to carry out nucleic acid testing, what is the reason?
At the press conference on the prevention and control of the new coronary pneumonia epidemic in Shanghai held today, Wu Fan, member of the expert group of the Shanghai epidemic prevention and control leading group and vice president of Shanghai Medical College of Fudan University, responded. “The previous screening, especially the screening in non-key areas and key areas, is equivalent to everyone going to a physical examination and taking a CT film. After finding out where there is a problem, the next step of targeted screening and control will be carried out. , targeted control.”
“This is related to the grid method of ‘reducing flow + nucleic acid screening’.” Wu Fan said that the key areas identified in Shanghai were based on previous epidemics The development of the epidemic situation, the number of cases, and the possible potential risk delineation of the mode of transmission are delineated on a street-to-town basis. After the drawing, these towns will reduce the flow and start nucleic acid screening.
There are several situations in which positive results appear after community nucleic acid screening. In one situation, all the streets and towns are negative, and the entire street and town are unblocked. However, there will be positives in the streets and towns that are more or less classified into the key points. If the streets and towns do not control the flow and are not gridded, the streets and towns will have to be all over again.
After meshing, there is almost no flow between the meshes. If there is a positive in the mesh, the mesh will be further screened. At this time, the grid can be directly understood as a residential area, and the residential area is further screened. During the screening process, everyone was relatively still. After screening again, it was found that some buildings were positive, and other buildings were negative. The grid cells were refined to the building, and there was no positive in this building. The lockdown was lifted, and the positive buildings continued to be screened.
In the process, the infected people who are found to be positive have actually been removed. The first thing to do is to fix them. If they stay at home, don’t move, don’t come out, just fix them in There, we can control the spread of the disease and play a role in interrupting the spread. Everyone can understand the relationship between “town-community-building”.
In response to the public’s problem that the nucleic acid results of grid-based screening are not coming out, Wu Fan said that usually people go to the hospital for nucleic acid testing, and the hospital will be able to get online in more than 4 hours or half a day after the collection is completed. Check the results. This time the results came out late. There is an objective reason, because this time it was a large-scale screening with a very large amount, and a 10:1 or 20:1 mixed test was used. After the inspection, if a positive tube is found, then you have to go to these 20 people and take samples separately.
20 people are single and single tube for re-examination. After the inspection, it is determined that one of them is positive. A preliminary epidemiological investigation will be conducted around the relevant information of this person, and accurate relevant medical information and personal information will be collected. After the information is collected, it will be reported for review. “Everyone feels different after this series of processes.”