Original title: Dalian epidemic is entering a plateau Expert: Among all respiratory infectious diseases, the cold chain transmission of the new crown is the most prominent Source: Global Times-Global Network
Global Times-Global.com news, from 0:00 to 24:00 on November 13, 60 new confirmed cases of new coronary pneumonia in Dalian City, since November 4, Dalian City has reported a total of 289 confirmed cases of local new coronary pneumonia. This round of the epidemic has the characteristics of school clustering. According to statistics from the Global Times reporter, in Zhuanghe University City, 67 students, faculty and staff were diagnosed within three days from the 11th to the 13th. Experts believe that the outbreak of the epidemic in the university city may be related to the colder weather and defects in prevention and control measures. Experts also mentioned that Dalian is a place where the cold chain of imported aquatic products is integrated. Among all respiratory infectious diseases, the cold chain transmission of the new coronavirus is the most prominent.
On the morning of the 14th, Zhao Lian, deputy director of the Dalian Municipal Health Commission, said at a press conference on epidemic prevention and control work that this epidemic has a high viral load, rapid spread, short intergenerational time, hidden illness, difficult to detect, and early emergence. More asymptomatic infections are characterized by unit clustering, family clustering, and school clustering. The cases are mainly concentrated in Keqiang Food Company, Haikuo Food Company and Zhuanghe University Town. Effective control has been carried out on the key groups involved, close contacts, and close contacts of close contacts.
Since November 4, Dalian has reported a total of 289 cases of new coronary pneumonia infections, including 235 confirmed cases and 54 asymptomatic infections. Up to now, Dalian City has adjusted 2 high-risk areas, and successively designated 31 medium-risk areas. Starting from November 14, all primary and secondary schools in Zhuanghe, Liaoning will temporarily suspend classes to carry out online teaching. Ten boarding schools are fully closed management, and boarding students are closed in dormitories.
Dalian epidemic has entered a plateau
Of the 60 newly confirmed cases of local new coronary pneumonia on the 14th, 58 cases were found in the active investigation of close contacts, and 2 cases were found in the active investigation of key populations. In an interview with reporters, Sun Ke, director of the Dalian Center for Disease Control and Prevention, said that the currently reported new cases are mainly detected in centralized isolation places. This is a good signal, indicating that the rising trend of the epidemic is gradually slowing down, and it is entering a stable period from the rising period. The epidemic is generally controllable.
Sun Ke said that this epidemic has a high transmission index (Ro value), strong infectivity, short incubation period, more than 100 cases in just five days, and nearly 300 cases reported in ten days. The number of cases has increased rapidly. Features. Secondly, it was found in the flow investigation that the onset of the epidemic was hidden, and most of the infected people had no obvious symptoms in the early stage. They formed a cluster of epidemics and many families in Dalian Keqiang Food Co., Ltd., Haikuo Food Co., Ltd., Shengfeng Market and other places. Clustered disease, and reported multiple cases in schools, causing a certain range of community transmission. The clustering nature of the epidemic and the emergence of super spreaders have led to a rapid increase in the number of cases.
The third cold chain-related epidemic in Dalian. Expert: Among all respiratory infectious diseases, the cold chain transmission of the new coronavirus is the most prominent
According to the information on the flow of confirmed cases, the first confirmed case in Dalian this round of the epidemic came from the first designated cold storage in Zhuanghe City. In fact, this is the third cold chain-related epidemic in Dalian. In July and December last year, the outbreaks in Dalian were all related to the cold chain of imported food.
Wang Guangfa, director of the Department of Respiratory and Critical Care Medicine at Peking University First Hospital, told the Global Times reporter on the 14th that Dalian is a place where the cold chain of imported aquatic products is integrated. Among all respiratory infectious diseases, the spread of the new coronavirus in the cold chain is the most prominent. This also illustrates the particularity of the new coronavirus, which is more susceptible than influenza, and it is therefore more difficult to prevent and control.
Regarding how to minimize the spread of the epidemic caused by the cold chain, Wang Guangfa suggested that government departments should strengthen the inspection of imported cold chain foods in areas with severe epidemics; secondly, in the disinfection process of cold chain products, it is necessary to check the processing, consumption, etc. Measures are taken in every link. For example, in the processing link, workers must wear and take off protective equipment in accordance with the prescribed procedures, strictly implement epidemic prevention measures, and consumers must also pay attention to cleaning and cooking in the consumption link.
The Dalian epidemic presents the characteristics of school clustering. Expert: Dining in the cafeteria may cause large-scale spread due to not wearing a mask
In addition, it is worth noting that the spread of the epidemic has the characteristics of school clustering. Among the 60 new local cases in Dalian on the 13th, 28 cases were from Zhuanghe University City, all living in school dormitories. According to the trajectory statistics of confirmed cases, 67 students and faculty members were diagnosed in Zhuanghe University City during the three days from 11th to 13th, of which 63 confirmed cases were college students and 4 confirmed cases were faculty and staff. The track of confirmed cases shows that three of the infected cases are employees working in the cafeteria of the university town, and one is a cook. At present, all confirmed cases have been transferred to Dalian Public Health Clinical Center for isolation and treatment.
According to the WeChat public account “Dalian Release”, Zhuanghe University City has two campuses in the east and west, with a total of 14,662 students, including 1,011 in the west campus, 4651 in the east campus, and 984 faculty members in the two campuses. As of 8 o’clock on November 14th, the confirmed student cases that have been announced are mainly distributed in Area A, Area B and Apartment 7 of Apartment 3 on the West Campus. As of 8 o’clock on November 14th, there have been a total of 3,291 closed-loop transshipment close contacts and high-risk groups. The students in Area A, Area B and Apartment No. 7 of apartment 3 involved in the epidemic have all been transferred to an isolated hotel for centralized management, and the two apartments have been emptied. The West Campus currently has 7,884 students, distributed in 31 buildings with 2503 dormitories under closed management. On November 13th, the ninth round of nucleic acid testing in the east and west campuses tested a total of 14,315 samples, and the results were all negative.
An immunology expert who requested anonymity told the Global Times on the 14th that since the outbreak, the school’s prevention and control measures have been relatively strict, and there have been occasional student cases before, but they have been controlled in time. The Dalian epidemic presents a cluster of schools. There have been a relatively large number of student cases in Zhuanghe University City, which may be related to the cold weather and defects in prevention and control measures. The expert believes that people may have time without masks when eating in the cafeteria, which creates the possibility of large-scale transmission between teachers and students. However, the expert said that according to the current measures of isolation and nucleic acid testing for all employees, cases will show a downward trend and the epidemic will be brought under control. However, in order to clarify the overall situation of the epidemic, it is best to carry out auxiliary examinations of antibodies at the same time.
Original title: Dalian epidemic is entering a plateau
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