Original title: [Epidemic Prevention and Control, Gansu in Action]
Grasp the source of the spread of the epidemic with scientific and accurate circulation - visit wang Xin, an expert of the Gansu working group of the comprehensive group of the joint prevention and control mechanism of the State Council and a researcher at the Institute of Infectious Diseases of the Chinese Center for Disease Control and Prevention
At present, the situation of the new crown pneumonia epidemic in Gansu Province is still grim, and carrying out epidemiological investigation as the basic and source work of epidemic prevention and control is the top priority in winning the battle against the epidemic. As of November 1, the province has completed a total of 52,400 circulation transfers, tracking 06,400 close contacts and 36,000 second close contacts. Among them, Lanzhou City, Tianshui City, Zhangye City, Jiayuguan City, Longnan City, Jiuquan City and other 6 cities tracked a total of 0.55 million close contacts and 17,500 sub-close contacts.
What is Flow Tone? How do I conduct a flow? What role does circulation play in epidemic prevention and control? On the afternoon of November 2, the reporter interviewed Wang Xin, an expert of the Gansu Working Group of the Comprehensive Group of the Joint Prevention and Control Mechanism of the State Council and a researcher at the Institute of Infectious Diseases of the China Center for Disease Control and Prevention, on issues related to circulation.
"Circulation is the abbreviation of epidemiological investigation, which is to use epidemiological methods to investigate the trajectory of a person's actions, encounters and events in a certain period of time in the past." In view of the current work of new crown pneumonia flow adjustment, Wang Xin said that in the face of such a new infectious disease, it is not enough to rely on traditional epidemiological investigation methods, but also to integrate the seroecology of detecting the level of new crown antibodies, analyze the viral load, molecular epidemiology of the whole genome sequencing of the virus, and use the digital epidemiology of public security and industrial information big data, which is a multidisciplinary and interdisciplinary technical work.
Wang Xin explained that on the one hand, the flow tune is to find the upper home, that is, to find the source of infection, and the more important meaning is to find the next home, that is, to check the risk point and risk group, so as to more accurately block the transmission. For example, if the police investigation case is a fight against visible criminals, the circulation is a fight against an invisible virus. In particular, compared with the new coronavirus strain circulating last year, the currently circulating Delta variant virus spreads faster and has a stronger transmission capacity, and the flow is a race against time, to rush ahead of the virus transmission.
Wang Xin concluded that the flow tune is not only to ask the parties a series of trajectories and questions, this is only the initial step of the flow tuning work, followed by a large number of laboratory testing and data analysis work, involving traditional epidemiology, seroecology, molecular epidemiology, digital epidemiology and other multidisciplinary disciplines, the comprehensive application of these knowledge, greatly improving the accuracy, comprehensiveness and timeliness of the flow tuning.
In the process of carrying out the circulation investigation work, some people questioned whether the application of public security big data investigation trajectory is an invasion of privacy, and whether they do not trust the respondents. In this regard, Wang Xin also gave an explanation. She said that the use of public security industry and information technology big data survey trajectory, is not not to believe the respondent, nor to touch personal privacy, but in the fast-paced life, many people are difficult to remember all the places they have been to and the people they have contacted, so they use big data to help the respondents more fully recall the places they have been to within a few days, the people they have contacted, and then use the mathematical fitting model to try to check all the risk places and risk points. In addition, through the intersection analysis of big data trajectories, it is possible to find unknown infected people who are exposed, which cannot be achieved by only asking the parties.
Wang Xin said that at present, the new crown virus sequencing application is the international advanced high-throughput sequencing technology, also known as the next generation of sequencing technology. In her opinion, in this Gansu epidemic, the Gansu Provincial Center for Disease Control and Prevention has independently completed almost all the sequencing work, which is very difficult.
"Genes are a powerful tool for tracing the origin of the new crown epidemic." Wang Xin explained that the whole genome sequence of the virus has an advantage, it is an objective biological evidence, especially when the flow tune finds multiple possibilities, the evidence of the sequence can give a more definite direction, and even sometimes correct the information bias that appears in some flow tones.
For the public how to prevent the new crown virus infection, Wang Xin also gave advice: avoid gathering, wear masks, and wash hands frequently. "Only by actively cooperating with the government to do a good job in epidemic prevention and control and doing a good job in self-protection can we jointly build an iron wall of joint prevention and control and group prevention and group control." New Gansu Gansu Daily reporter Wang Ruijun
【Source: Gansu Daily】
Copyright belongs to the original author, a tribute to the original
![WM Motors, which was once a "high-ranking official", is now only relying on chief growth officer Wang Xin, which is afraid that it will be difficult to last for a long time[fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)