Wuhan nucleic acid "census" results announced

Posted By: Robert Hou In: Covid-19 News On: Comment: 0 Hit: 1132

The results of this concentrated nucleic acid test showed that at present, the proportion of asymptomatic infected persons in Wuhan is extremely low in the entire population, and no cases of asymptomatic infected persons infecting others have been found.

Wuhan City announced the results of the concentrated nucleic acid test on the 2nd. From 04:00 on May 14 to 24:00 on June 1, 9899828 people were detected. No confirmed cases were found. 300 asymptomatic infections were detected. No asymptomatic infections have been found The situation where the person infects others. Regarding the results of nucleic acid "census", "Xinhua Vision" reporters tracked four focus issues.

Has centralized inspection achieved inspection due diligence and willingness to complete inspection?

From May 14th, Wuhan City has deployed centralized nucleic acid detection and screening to screen for asymptomatic infections. The reporter learned from the press conference of the Hubei Province New Coronary Pneumonia Epidemic Prevention and Control Command on the 2nd that from 04:00 on May 14 to 24:00 on June 1, Wuhan City concentrated 9899828 people for nucleic acid detection; A total of 10.109 million people have completed nucleic acid testing in Wuhan, basically covering all personnel.

Fangcao Community, located in Longyang Street, Hanyang District, Wuhan City, is a comprehensive community integrating housing, commercial buildings, and commercial circles. There are many construction sites in the community. According to Du Yun, secretary of the party branch of Fangcao Community, in addition to organizing residents' testing, the community also notified merchants and site workers to participate in the testing. "There are nearly 7,000 permanent residents and floating population in our community, of which about 5,000 people have participated in centralized nucleic acid testing, and more than 1,000 people have completed nucleic acid testing before."

Du Yun said that within five days of its jurisdiction, nearly 90% of the residents' sampling work was completed. "We contacted the police station to get the data of the floating population, checked them one by one, and called to ask them where they were and whether they had completed the nucleic acid test. We tried to ensure that everyone in the jurisdiction should check it."

In order to allow residents to participate in centralized testing as much as possible, Wuhan districts also set up sampling points for "checking for deficiencies and filling leaks", and at the same time, make supplementary pick-up services for the elderly and the disabled and other groups with limited mobility.

"I went to Hunan on the 13th for a business trip and didn't return to Wuhan until yesterday afternoon." On the morning of May 31, 23-year-old Yu Ming waited for a concentrated nucleic acid test at the Jinyinhu Street Community Health Service Center in Dongxihu District, Wuhan City. The others queued, and he completed the test within a quarter of an hour. "The community has extended the testing time for the missing residents. Now that everyone has done the testing, I feel more at ease."

For a few people who have not returned to Han, some community secretaries said they would advise them to go to the hospital to complete nucleic acid testing after returning to Wuhan.

With nearly 9.9 million people inspected in more than 10 days, how to improve the inspection efficiency and ensure the accuracy?

It is understood that in the process of centralized testing, Wuhan's daily testing capacity quickly exceeded 1 million from 300,000.

Wang Weihua, deputy director of the Wuhan Municipal Health Commission, revealed that in order to ensure the successful implementation of centralized nucleic acid testing, the health and health department adopted methods such as digging potential and externally mobilizing resources to mobilize medical institutions to participate in testing. The number of third-party testing institutions in Wuhan increased from 23 to 63, the number of testing personnel increased from 419 to 1451, and the number of testing equipment increased from 215 to 701 sets. Through staff turnover, the equipment kept running and operated at full load for 24 hours. To achieve a significant increase in detection capabilities in a short time.

"Employees work three shifts 24 hours a day, and the daily testing capacity is raised from 8,000 to a maximum of 37,000." On June 2, the reporter saw at the Wuhan Jinyu Medical Laboratory in the Wuhan Development Zone that the unit was temporarily built in front of the building Of several mobile homes have not been demolished. Liu Mingyang, the person in charge of the screening activity project of the Wuhan Jinyu Medical Laboratory, told reporters that these mobile houses are temporary reception sites for new coronavirus samples. A few days ago, there were 280,000 test samples from Wuhan Development Zone and Hanyang District. , Qiaokou District sent, in order to cope with the heavy testing tasks, the unit's group mobilized nearly 100 people from other provinces, more than 30 sets of testing equipment to come to support.

It is worth noting that, in addition to the single-tube test, in order to improve the detection efficiency, Wuhan also adopted a mixed detection method, that is, multiple samples are mixed, and if abnormalities are found, the single sample is rechecked. According to the relevant person in charge of a testing agency, over 350,000 nucleic acid samples have been tested in the past ten days. "The results show that the accuracy rate of "Five Mixing One" is also high."

According to reports, based on relevant research at home and abroad and multiple batches of small sample experiments, the provincial and municipal experts have demonstrated that the mixed sample test is suitable for centralized nucleic acid detection in Wuhan City, and the combined test does not exceed 5 samples combined detection. This centralized inspection accounted for 75.3% of single inspections and 24.7% of mixed inspections, which improved inspection efficiency.

Zhang Dingyu, deputy director of the Hubei Provincial Health Commission and director of Wuhan Jinyintan Hospital, introduced that for the purpose of verifying the quality of testing, each testing agency reviewed the positive or suspicious positive samples one by one; at the same time, the Wuhan Clinical Testing Center conducted a test for each testing agency. Sampling review, a total of 35,961 samples were taken, and no inconsistencies in the test results before and after were found.

300 asymptomatic infections were detected, how to manage them later?

According to reports, among the 9899828 people who were intensively tested, no confirmed cases were found, 300 asymptomatic infections were detected, the detection rate was 0.303 per 10,000, and 1174 close contacts were followed, and their nucleic acid test results were all negative.

Whether an asymptomatic infected person is infectious has always been a question in the public's mind. The results of this concentrated nucleic acid test showed that at present, the proportion of asymptomatic infected persons in Wuhan is extremely low in the entire population, and no cases of asymptomatic infected persons infecting others have been found.

Lu Zuxun, chairman of the Social Medicine Branch of the Chinese Society of Preventive Medicine and professor of the School of Public Health, Tongji Medical College of Huazhong University of Science and Technology, shared a set of data. Since April 26, the Wuhan Center for Disease Control has collected sputum and pharyngitis from 106 asymptomatic patients Swab samples, after virus isolation culture and sequencing analysis, did not cultivate "live virus"; since May 14th, Wuhan CDC has sampled 300 families of asymptomatic infected persons and their living environment, collected asymptomatic A total of 3343 samples of wipes such as masks, drinking glasses, toothbrushes, and mobile phones used by infected persons were tested negative.

People with asymptomatic infections have attracted much attention. How can the 300 asymptomatic infections detected be further strengthened? Feng Zijian, deputy director of the Chinese Center for Disease Control and Prevention and an expert in the Liaison Group of the Joint Prevention and Control Mechanism of the State Council, who witnessed the whole process of the concentrated nucleic acid detection and inspection in Wuhan, introduced that the investigation did not find the situation of asymptomatic infections infecting others, but Wuhan still Adopt a "strict prevention" strategy, and adopt closed-loop management of the whole process of discovery report and isolation treatment for asymptomatic infected persons.

To this end, the State Council Joint Prevention and Control Mechanism Liaison Group also instructed Wuhan City to set up a team of clinical experts and psychologist experts to achieve the "one person, one plan" for the diagnosis and treatment of asymptomatic patients. Asymptomatic infected persons should go to designated hospitals or community health service centers for follow-up and follow-up visits in the second and fourth weeks after the release of concentrated medical observation, so that follow-up follow-up and closed-loop management can be achieved.

How can the results of the "census" be applied to normalized epidemic prevention and control?

For more than ten days before and after, with a total expenditure of about 900 million yuan, what effect will the results of centralized nucleic acid detection and inspection have on subsequent normalized epidemic prevention and control?

Lu Zunxun said that through centralized investigation and big data analysis, community prevention and control can be more precise, and it is convenient to improve prevention and control strategies more targetedly, such as timely adjustment of public health emergency response levels, and orderly opening indoor public places.

"The results of this nucleic acid test have important reference value for Wuhan to adjust the next prevention and control measures." Zhang Dingyu believes that from an epidemiological point of view, although the possibility of sporadic sporadic cases cannot be ruled out, it is also at the same time as prevention , Can be combined with reality, optimize and adjust the community management measures to better facilitate the lives of residents.

At the press conference, Li Lanjuan, a member of the high-level expert group of the National Health and Health Commission and an academician of the Chinese Academy of Engineering, said that 97% of the communities in Wuhan that have not screened for asymptomatic infections are already very high. On June 1, Wuhan CDC also collected wipe samples of tap water, domestic sewage, taxis, buses, subway cars and stations, shopping malls, restaurants, parks, etc. in Wuhan, and collected some pet samples, 2314 samples The test results are also negative.

"It's more reassuring to see neighbors also shove their test results in the group one after another." Wuhan citizen Zhu Ke said.

"With this nucleic acid test result, citizens can carry out outdoor activities in an open outdoor, non-closed place with sufficient spacing." However, Zhang Dingyu also reminded that the habit of using public chopsticks and spoons, dividing meals, and washing hands frequently should still be maintained To avoid cross infection.

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