Reporter | Lin Zhiyin, Ma Chenchen, Wu Simin, Qian Tongxin
Just after getting up on the morning of the 9th, Ms. Wan of Tianjin Jinnan District found that her health code became "orange".
From 18:00 on January 7 to 21:00 on January 8, 20 cases of positive infection suddenly appeared in Tianjin. At 24:00 on the 8th, the Tianjin Municipal Center for Disease Control and Prevention completed the whole genome sequencing of the new coronavirus in 2 of the indigenous cases, and determined that it belonged to the Omicron variant.
This is by far the largest number of cases of indigenous infection in the country caused by Aomi Kerong.
From 21:00 on January 8 to 21:00 on January 9, Tianjin Jinnan District reported again: 20 nucleic acid test personnel with new coronavirus nucleic acid test personnel throat swab sample nucleic acid test results were positive and have been transferred to the designated hospital of the city for further diagnosis and treatment. As of that night, Tianjin had reported a total of 40 cases of positive infection.
Due to the "rapid transmission speed, strong concealment and strong penetration" of the epidemic, in the early morning of January 9, the Tianjin Epidemic Prevention and Control Team and the Command issued an announcement that since 7 o'clock on the 9th, we have stepped up the screening of all staff and made every effort to build a solid epidemic prevention and control network. If the residents of the relevant district do not participate in the nucleic acid test within the prescribed time, the "health code" is adjusted to the "orange code", and after completing the nucleic acid test and the result is negative, it is changed to the "green code".
Earlier, on the evening of January 8, at the 163rd press conference on the prevention and control of the new coronavirus pneumonia epidemic in Tianjin, Zhang Ying, deputy director of the Tianjin Municipal Center for Disease Control and Prevention, said that the two cases originally found were not related to imported cases from abroad from the process and investigation of circulation. Zhang Ying also said that from the relationship between these cases and the chain of transmission, the virus has been spread for at least three generations, and the spread of this epidemic in the community may have continued for some time.
The Aomi Kerong mutation was fierce, and the defense of Tianjin began. Epidemiological investigation, investigation and control of epidemic-related personnel, environmental sample collection and other work are in full swing, and Tianjin has also ushered in the first major examination of nucleic acid screening for all employees.
It has been transmitted for at least three generations
At 24:00 on January 8, 2022, the Tianjin Municipal Center for Disease Control and Prevention completed the whole genome sequencing of the new coronavirus in two new local cases in Tianjin, and after analysis and comparison, and confirmed by the Chinese Center for Disease Control and Prevention, the two indigenous cases of the new coronavirus belong to the VOC/Omicron variant (BA.1 evolutionary branch) and belong to the same chain of transmission.
The two cases were only announced on the morning of 8 January, and were the first to be discovered in this round of local outbreaks in Tianjin, and the two cases have already developed an epidemiological link through other cases.
The two cases initially detected, judging from the process of circulation and investigation, were not found to be related to imported cases from abroad. The initial source of infection in Omikejung, which was previously found in other cities across the country, was due to imports from abroad.
Specifically looking at these two cases, one is a staff member of a childcare institution in the east district of Linjin Garden, Xinzhuang Town (hereinafter referred to as "positive infected person 1"), whose home address is Huayuan New Town, Nankai District, who often resides in Xinzhuang Town, Jinnan District, due to work needs, and the patient has not left Tianjin for 14 days before the onset of illness; the other is a student of Xianshuigu Seventh Primary School in Jinnan District (hereinafter referred to as "positive infected person 2"), living in Xianshuigu Town, Jinnan District, Tianjin City, and the patient has not left Tianjin for nearly 14 days.
The two positive cases have been identified as homegrown confirmed cases of COVID-19 (mild).
The first financial reporter combed the trajectory of positive infected people1, showing that from December 23, 2021, as of January 7, 2022, he repeatedly picked up students from Gaozhuangzi Primary School to the east district of Lin Jin Garden.
Of the 20 cases of positive infections that were found this time, 4 of them were students of Gaozhuangzi Primary School, all of whom were students in the custody class where positive infected person 1 was located.
At the same time, 2 cases were students of Xinzhuang Middle School and students in the custody class of positive infected person 1. In addition, there were 4 cases of family members of students in the care class of 1 of the positive infected person.
From this point of view, transmission caused by positive infected person1 has been passed on for at least three generations.
Judging from the positive infected person 2, there are 8 cases of its associated cases, all of which are students of The Seventh Primary School of Xianshuigu and are also classmates of the infected person.
Positive infected person 1 and positive infected person 2 belong to the same chain of transmission, but how it spreads between them remains to be investigated.
Zhang Ying also said that from the relationship between these cases and the chain of transmission, the virus has been spread for at least three generations, and the spread of this epidemic in the community may have continued for some time.
Where is the source of the infection
What is the source of the current round of tianjin local epidemic? Tianjin is speeding up the traceability of circulation.
It is worth noting that Tianjin is also the first city in China to report the detection of imported cases of Aumechjong. On December 13, the Tianjin Municipal Center for Disease Control and Prevention conducted whole genome sequencing and sequence analysis of the new coronavirus on the respiratory specimens of asymptomatic infected persons imported from outside Tianjin on December 9, and after review by the Chinese Center for Disease Control and Prevention, it was confirmed that the Omiljung variant of the new coronavirus (B.1.1.529 evolutionary branch) was detected. However, at present, Tianjin has confirmed that the infection of Aomi Kerong found this time and the sequence of the Aomi Kerong variant of the imported cases found in Tianjin cannot be confirmed as the same chain of transmission.
Up to now, there have been imported cases of Aomi Kerong in Tianjin, Guangzhou, Changsha, Shenzhen and Zhejiang, and no indigenous infection has been triggered except for Guangzhou. The imported case of Aomi Kerong in Guangzhou was found positive during the home isolation period after the end of centralized isolation, which triggered 3 cases of infection among the residents of the same building, and finally did not spread widely.
Liang Xiaofeng, vice president of the Chinese Preventive Medicine Association and professor of the School of Basic Medicine and Public Health of Jinan University, said in an interview with the first financial reporter that the reason why there will be local infection cases in Tianjin this time may be related to the mild symptoms after infection with Aomi Kerong and it is not easy to be found.
The positive infected people 1 and positive infected people 2 found in Tianjin in this round of local epidemic situation were confirmed to be mild, of which positive infected person 1 had chills, coughing up phlegm and runny nose in the early morning of January 6, self-measured body temperature up to 36.9 °C, 10:12 from Ruicheng Pharmacy (Xinzhuang Store) to buy drugs; on January 7, he took a taxi to Jinnan Hospital for nucleic acid sampling and testing; in the early morning of January 8, the nucleic acid test was initially positive, and then transferred to the centralized isolation observation point.
"The symptoms are mild and not easy to detect, which is a major feature of the virus, which will cause many people to be reluctant to seek medical treatment, thinking that they can carry it, coupled with the rapid transmission speed of the virus, it will lead to a wider range of transmission, the virus has brought great challenges to the prevention and control of the health system, and this time it is also a big test for Tianjin." Liang Xiaofeng said.
At about 1:00 a.m. on January 9, 2022, Li Hongzhong, secretary of the Tianjin Municipal Party Committee and head of the Tianjin Municipal Leading Group for Prevention and Control, presided over a meeting of the Municipal Prevention and Control Leading Group and the Headquarters in the video conference room of the Municipal Party Committee. The meeting pointed out that the whole genome sequencing of the virus in this epidemic belongs to the Omikerong variant, which shows the characteristics of fast transmission speed, strong concealment and strong penetration. In view of the severe and complex epidemic situation, the Tianjin Municipal Party Committee, the Municipal Government and the Municipal Prevention and Control Headquarters decided to carry out nucleic acid screening for all employees throughout the city.
In his speech, Li Hongzhong stressed that it is necessary to thoroughly implement the spirit of General Secretary Xi Jinping's important instructions, adhere to the bottom line thinking "bottom" to the end, pay close attention to the step-by-step stubble organization to carry out nucleic acid screening for all employees, take rapid and decisive measures, make every effort to block the transmission channels of the epidemic, and resolutely build a "moat" for epidemic prevention and control in the capital.
The outbreak of Aumechjong in Tianjin has sounded an alarm bell for the outside world.
At the Guanghua Science and Technology Public Welfare Forum held on January 8, Zhang Wenhong, director of the National Center for Infectious Disease Medicine and director of the Department of Infectious Diseases at Huashan Hospital affiliated to Fudan University, refuted the claim that Omilton was a "big flu", saying that there was "no scientific basis".
Zhang Wenhong said that Aumi kerong is the natural selection result of the new crown virus under the pressure of human immunity, this variant strain "will bite people", and a country and region need a strong immune barrier and medical resources to resist the threat of Omicron.
Zhang Wenhong also believes that the reason why Western countries are "hard" in this wave of epidemics is mainly from vaccines, and its effect needs to be further evaluated. At present, the new crown vaccination rate in the United States is close to 70%, and the three-shot vaccination rate is 22%, so most healthy young people are expected to "break through" this wave of epidemics safely, but what about people with low immunity? The outlook is not promising.
Liang Xiaofeng said that the base of Chinese mouth is large, and the treatment of the virus can not be relaxed. At present, we still want to appeal to everyone, once symptoms are found, to seek medical treatment in time, and the whole society should increase the vigilance of the virus, external prevention of imports, internal prevention of rebound. In addition, scientific research should step up research on the virus.
Lu Hongzhou, Department of Infectious Diseases of the Third People's Hospital of Shenzhen and National Clinical Research Center for Infectious Diseases, issued to the First Financial Reporter in a "Scientific Prevention and Control of the Novel Coronavirus Omilon Variant Strain", which proposed that at present, the detailed characteristics of the Omilon mutation strain are becoming clearer and clearer. Given that the same mutations were observed in the spike protein in previous VOCs (strains of the virus of concern), this suggests that current public health measures, including ventilation, safe distancing, frequent hand washing, and wearing masks, are also effective against the Omiljung variant.
Lu Hongzhou said that compared with the Delta strain, the spread and concealment of Aomi Kerong are stronger, which is also the two major difficulties in epidemic prevention. There is a high probability that Aomi Kerong will develop into a local cluster in a short period of time, and the pressure on medical resources will increase sharply. In addition, its main symptoms are runny nose, sneezing, sore throat, etc., patients will mistakenly think that it is a common cold or seasonal flu, and the possibility of active detection is relatively small, which brings a lot of challenges to the speed and accuracy of large-scale screening.
The epidemic prevention and protection work is meticulous and orderly
Affected by the epidemic, since January 8, Tianjin has suspended offline training services and hosting services for off-campus education and training institutions, vocational training institutions, adult training institutions, and custody service institutions. On January 9, all the interviews scheduled for the teacher qualification examination in the city were cancelled, some subway stations were temporarily closed, and some scenic spots were temporarily closed.
Ms. Wan, who is in the epidemic control area, told the first financial reporter, "At noon, the whole family went to do nucleic acid testing, although the queue was very long, fortunately, the efficiency was very high and the progress was fast." I told the kid, let's go to nucleic acid, there are a lot of 'big white aunts' with you, he thought it was a very fun game. ”
Although many citizens have a relaxed attitude, some citizens still encounter confusion.
Ms. Ma, who lives in Xiqing District, told reporters that after she saw the local case in Tianjin on the 8th, she took the initiative to receive the third dose of the new crown vaccine "strengthening needle". However, after vaccination, it takes 48 hours before the nucleic acid test can be carried out, so she is worried that it may affect travel after Monday becomes an "orange code", "Report to the unit on Monday morning and see the situation."
On the same day, many netizens found that a number of official Weibo accounts, including Tianjin Local Television Station and Jinyun, a new media of the Propaganda Department of the Tianjin Municipal Party Committee, were making regular broadcasts of information on 51 fever clinics and 40 nucleic acid testing waiting clinics in the city, "from 6 o'clock, every 2 hours."
Such meticulous work won the praise of the public. Some Tianjin citizens said that since the beginning of the epidemic in 2020, it has always been like this and has never been interrupted. "It turns out that there is no temporary cradle!" A netizen left a message.
In terms of materials, the first financial reporter learned from the Tianjin Municipal Bureau of Commerce that after the outbreak of the epidemic, the municipal and district commercial departments launched the market supply emergency plan for the first time, and organized more than 40 supermarkets and vegetable markets such as Wumart, China Resources, Renrenle and Century Hualian to provide point-to-point distribution and supply for the sealed community to ensure the stable supply of daily necessities in the sealed community.
"I went to the market early this morning to buy vegetables, except for the four cents per kilogram of eggs, the other prices have not changed much." Seeing that the shelves are full of food, there is not much to stock, preferring to buy fresh. "Mr. Zhou, who lives in Tianjin's Hedong District, told reporters that neither he nor his friends around him are worried about the procurement of materials." Today I also saw on TV that two reporting hotlines were announced, and when I found that the price violation was illegal, I could report it at any time. ”