When the national shock caused by the last round of the Nanjing epidemic gradually subsided, the local transmission caused by external sources reappeared again, but this time it happened in an elementary school in Xianyou, a small town in Fujian.
On September 10, 2021, Putian City, Fujian Province, during a nucleic acid test for new crown virus among students at a primary school in Fengting Town, Xianyou County, found that 2 students had a positive nucleic acid test result. After that, a total of 6 people were found to have nucleic acid after screening. Those who are positive have been sent to a designated hospital for isolation and treatment in the Affiliated Hospital of Putian College.
As of 16:00 on September 11, this round of the epidemic in Putian, Fujian has reported 24 nucleic acid-positive cases, including 6 confirmed cases (5 ordinary and 1 mild) and 18 asymptomatic infections. As of 16:00 on the 11th, 1321 people have been circulated, 500 people in close contact have been judged, 821 people have been closely contacted, and 885 people have been under centralized medical observation.
On the evening of September 11, the Press Office of the Putian Municipal People's Government held a second press conference. The press conference announced that at present, the results of the genetic testing of the epidemic-related cases were preliminarily determined to be the Delta strain.
Is it required to extend the time of centralized isolation?
According to the introduction by Ling Longmei, director of the Putian Center for Disease Control and Prevention, at the press conference, Xianyou County found two copies on the evening of September 9 when it routinely carried out random inspections of 10% nucleic acid every half month for school students after school started. The test result of the sample (mixed sampling tube) was positive, which is the first positive case found in this epidemic.
The two students are brothers. The elder brother is 12 years old and the younger brother is 10 years old. After the expanded sampling, it was soon discovered that the parents of the two brothers, as well as the father of a classmate Lin Moumou and Lin Moumou, also tested positive for nucleic acid.
Classmate Lin Moumou is 12 years old this year. His father is Lin Mojie. Lin Mojie is an overseas returnee. On August 4th, he took Xiamen Airlines Flight 852 from Singapore and entered Xiamen Airport. After 14 days of quarantine at a designated hotel in Xiamen, Point-to-point transfer to Xianyou County centralized isolation point on August 19th to continue centralized isolation, and home health monitoring began on August 26th. The press conference announced that Lin Moujie was quarantined for 21 days, during which 9 nucleic acid tests were negative, and 1 serum test was also negative. On September 10, the nucleic acid test results were positive and the virus incubation period was long.
An epidemiology professor at a domestic university who did not want to be named analyzed "China News Weekly". At present, the evidence is lacking. It is difficult to determine the source of this transmission chain as Lin Moujie. There are also speculations whether it is possible in Xiamen Hexian. The hotel in the quarantine site was infected. This requires further investigation and sampling to see if the environmental samples of the quarantine point are found to be positive. "If you look at the nucleic acid test alone, there have been cases where the test was negative a dozen times and then suddenly became positive."
Since the more contagious Delta virus spread, there have been several cases of overseas associations in China.
As for the anti-epidemic and quarantine measures for people entering the country, most cities currently implement "14+7", that is, 14 days of centralized isolation + 7 days of home isolation. The isolation measures implemented by Lin Moujie were stricter than normal. First, they were quarantined for 21 days before implementing home health monitoring, but in the end possible transmission still occurred. This once again raises people’s concerns. In the face of the increasingly cunning Delta virus, is it necessary to further extend the quarantine period after entry?
The above-mentioned epidemiology professor pointed out that Delta has a high viral load and a long detoxification time. This is already a consensus of everyone. At present, the original "14+7" control measures are not enough, but The problem is that even if the quarantine time is extended, such as "14+14", the virus cannot be controlled from the source, and the quarantine time is too long, which will bring a series of problems. The current pain point is that nucleic acid is actually a very inefficient detection and screening method. False negatives and the new characteristics of the mutant virus are not conducive to nucleic acid detection. The key is: whether there is a faster, more efficient, and Accurate detection and investigation methods can accurately judge whether overseas personnel have been infected?
Because most people have been vaccinated, and the effect of antibody testing is very small. The above-mentioned epidemiology professor suggested that antigen testing can be tried in the future. Countries such as the United Kingdom are already trying, but whether it can be promoted on a large scale, new research results are still needed. And related data are released.
"The scale of this epidemic will not be too small"
What is the scope and impact of this epidemic? Will it spread further to Xiamen and other places?
The above-mentioned epidemiological experts pointed out that one thing needs to be clarified that Xianyou is the end of the transmission chain, and there are multiple nodes upstream, such as whether positive samples are found in the environment of the isolation point hotel, from Xiamen to Xianyou, this During the process, Lin Moujie's movement trajectory and close connections, etc., must be thoroughly investigated. Moreover, Xianyou County’s isolation control measures and social governance levels are far from comparable to those in large cities. Just like this year’s Shijiazhuang epidemic, a certain degree of invisible transmission has been formed when it was discovered. “You only have to hear which county has the case found. In fact, it is already relatively late, and its upstream must have problems," the expert said. "Judging from the current situation, the scale of this epidemic will not be too small."
At present, the five villages of Xinan, Xibei, Jianguo, Putou, and Xiufeng in Fengting Town where the 6 positive persons in Xianyou live have been closed and controlled. Five new medium-risk areas were added to the local area, namely Xiufeng Village, Gengfeng Village, Jiushe Village, Lanyou Community, and Xiajie Community, Fengting Town, Xianyou County, as medium-risk areas, and two high-risk areas: Xianyou County Putou Community and Linshan Village in Fengting Town.
Xianyou County is part of Putian City. As early as 2013, it had a population of 1.16 million, making it the most populous county in Fujian. Xianyou is located in the middle and upper reaches of Mulan Creek. On the east slope of the Daiyun Mountain Range, 75% of the whole area is mountainous. There are 326 villages spread across the county’s 1835 square kilometers. Because of limited resources and poor arable land, Xianyou There are many poor households in Xianyou County. At the beginning of 2016, Xianyou County had 6,296 households with 21,083 people in poverty, accounting for 67.3% of the city, and all have been lifted out of poverty. In 2020, all 38 impoverished villages in the county will have their hats removed.
Since the outbreak of the epidemic, whether it is the ongoing large-scale nucleic acid investigation or the closed-loop management of close isolation, it has been a huge challenge to a populous county that has just escaped from poverty.
According to Ling Longmei, director of the Putian Center for Disease Control and Prevention, after the outbreak, a total of 1,100 nucleic acid testers were organized to carry out expanded nucleic acid testing in Fengting Town, Xianyou County. As of 16:00 on September 11, a total of 81,938 samples were collected. , 10102 negative test results, 24 positive test results, 71836 positive test results and pending report. In addition, the nucleic acid tests for the total population of 101,000 in 24 villages in the town will be completed within 11 days.
Since September 11, Xianyou has implemented the strictest epidemic prevention policy. All provincial and inter-city shuttle buses were suspended, and all local buses were immediately suspended. All Internet cafes, entertainment venues, performance venues, movie theaters, fitness venues, bars, foot bath shops, bathing centers and other crowded business establishments in the county are temporarily closed. In addition, the headquarters for the response to the new crown pneumonia epidemic also requires all personnel in the medium-risk area to be automatically isolated at home.
From this transmission chain, it can be found that the isolation measures implemented by Lin Moujie are stricter than normal. First, they have been quarantined for 21 days before implementing home health monitoring. Generally speaking, during the home monitoring period, it is necessary to implement "non-essential do not go out". , Especially not to go out for parties, travel, etc. However, a reporter from the Beijing News found that during the home monitoring period, Lin Moujie still went to the next city to visit relatives and have a meal, and to move across cities. At present, the policies implemented by the cities are different, and there is no unified definition of home isolation and home monitoring, which brings confusion in practice. However, in rural areas, epidemic prevention is weak, with a shortage of personnel, and it is more difficult to manage home isolation. This is also one of the problems facing the Xianyou Epidemic Prevention Headquarters.
In the opinion of the above-mentioned epidemiologists, rural areas have limited capacity for their own prevention and control, and cannot achieve precise prevention and control as in large cities. This is also one of the loopholes in my country's overall epidemic prevention.
On September 11, the National Health Commission has sent a working group to Putian City, Fujian Province to guide the handling of the epidemic.
The Xianyou epidemic happened at the school and it was the beginning of the school season, which reminded people to be extra vigilant against cluster outbreaks of the epidemic in schools. The interviewed experts suggested that in order to prevent this kind of overseas-related cases from recurring in schools, on the one hand, it is necessary to strengthen the management and control of immigrants. Returnees also recommend that students do not enter school immediately, and can be isolated at home for a period of time to reduce the risk of transmission as much as possible. At the same time, we must continue to promote universal vaccination.
The above-mentioned epidemiological experts also pointed out that after the delta epidemic, experts have been calling for adjustments to the prevention and control program at the national level as soon as possible, strengthening and optimizing the original measures, and introducing more specific new measures, but at present, the specific policies are still Under development. He believes that it needs to be "faster".
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