Wear a mask! The infected person coughed in the elevator, and the neighbor entered without a mask. He was infected!

Tianjin epidemic prevention and control conference, November 24, from 24:00, Tianjin will be the Binhai New Area Hangu Street, the central fishing port cold chain logistics area A and B areas adjusted to low-risk areas. From 10:00 a.m. on November 21, Tianjin started the "Bincheng screening". By 10:00 p.m. on November 23, 2467411 nucleic acid sampling work was completed. All test results were negative.

[Why is there no correlation between Tianjin Hailian Cold Storage and the epidemic in Overlooking Haixuan?]

At the press conference, Ms. Zhang Ying, deputy director of the Tianjin Center for Disease Control and prevention, introduced that the Hailian cold storage was not related to the epidemic situation in Kuan Haixuan, and that they were two independent diseases. The basis of judgment is not simply from the geographical location, personnel contact, more important is the virus gene.

After rough sequencing, Hailian Cold Storage shows that its virus gene belongs to 2 branches of L genotype European family, while Overlooking Haixuan belongs to 1 branch of L genotype European family. Their upper edge is the same, just like families, two brothers are two different branches. From gene sequencing, it can be judged that the two epidemics are completely unrelated.

There are also different modes of transmission. So far, there has been no further human-to-human transmission in Hailian Cold Storage, only material-to-human transmission. The infection of other residents in the community occurred in the later period of Haixuan from object to person, which is also the difference between the two epidemics.

[Hailian cold storage infection source is North American pig head]]

At the press conference, Ms. Zhang Ying, deputy director of Tianjin CDC, introduced the source of the epidemic in Tianjin Hailian cold storage: North American pig head!

On October 7, Dezhou City, Shandong Province announced that a batch of German imported pork knuckles were transferred from Tianjin Port to Dezhou City, and the outer package was positive for nucleic acid. Tianjin Health and Health Commission followed this line to conduct a full investigation of Hailian Cold Storage and found cases 138 and 139.

Case No. 138 was a porter, and the cargo to be moved was a German pig elbow.

Case 139 was the driver of the cargo, transporting a North American pig's head, but he did not transport a German pig's elbow.

The flow shows that the two do not know each other and do not have any intersection. Moreover, the pork elbow is stored in the No.4 cold storage, while the pig head is transported away at the No.6 gate, and there is no intersection between the two items. Further epidemiological investigation was carried out, the monitoring in the cold storage was transferred, and the main cause of the infection of case 139 was finally found out.

The green on the picture is six different cold storehouses, and the light color on the ground is the working platform of workers. This part is at normal temperature.

November 4 is the storage day of Hailian cold storage. On that day, three batches of goods were transported to Hailian cold storage at different times. One batch was German pig elbow and the other two batches were North American pig heads. There is a key figure in this is the loader, case 138 (loader). he unloaded the pig elbow stored in the warehouse, and he also unloaded the pig head into warehouse 2, but he did not unload the pig head into warehouse 5.

November 5 is the delivery day for the three batches of goods, and German pig elbow is shipped from the 4th warehouse operation platform. Case 138 (porter) He finished carrying the pig head in warehouse 2, and the next day he was still wearing the same clothes, wearing the same gloves, without disinfection, and continued to leave the pig elbow. It is possible that the positive detection of pig elbow and packaging in Dezhou, Shandong Province was caused by contamination of the clothing or gloves of case 138 (porter).

　　Truck drivers not involved in pig head handling

　　How did he get infected?

The truck driver, that is, case 139, did not participate in pig head handling during the whole transportation process. how did he get infected?

After obtaining the video, it was found that during the process of taking out the pig head from the warehouse, the outer package of the pig head was scattered, and the pig head with a layer of plastic film rolled to the ground. The driver took part in picking up the pig head. He picked up the pig head and put it back into the car. Therefore, he was exposed to the pig head, which can explain that the source of his infection in case 139 was indeed the pig head. The source of the infection locked in this incident was a North American pig head, which contaminated the pig elbow in Germany, causing the outer packaging of the pig elbow to be positive.

The nucleic acid test in the place where the pig head was scattered was positive, and the sequencing was completely consistent with the gene sequencing of cases 138 and 139. Thus, the epidemic situation can confirm that the North American pig head was the source of its infection, case 138 participated in the removal and unloading of the pig head, and case 139 participated in the picking of the pig head. In addition, the sheets of three beds in the place where the porters were resting also tested positive for the new coronavirus nucleic acid, which can basically be confirmed and closed.

　　[Overlooking the cause of the new coronavirus infection in Haixuan community exposed: the first infected person had coughed in the elevator]]
Recently, eight people infected with the new coronary pneumonia virus have appeared in succession in Tianjin Dongjiang Port District, and Zhang Ying, deputy director of the Tianjin Center for Disease Control and Control, announced today the results of the virus traceability in the district.

Overlooking the Haixuan community, the outbreak is mainly concentrated in Building 4 and Building 19, of which Building 4 is the first building in the Haixuan community to be tested positive for the new coronavirus nucleic acid Wang a living building, involving a total of 4 infected people.

In addition, there were four infected people in Building 19, which was not related to the new coronavirus infection, including three members of the Yang family living in the building (Yang and his parents, living in two adjacent suites on the same floor), and a Shen who had an office in the building.

　　Analysis of Infection Chain in Building 4 of Overlooking Haixuan Community

After many days of tracking, it was found that Wang, the first infected person in the community, did not wear a mask when taking the elevator, and coughed and sneezed in the confined space of the elevator, which polluted the elevator environment and caused other residents in the community to be infected.

On November 9, the infected Wang's company organized him to undergo nucleic acid testing. In the morning, Wang first entered the elevator of Building 4. He did not wear a mask in the elevator and coughed inside.

Less than two minutes apart from him, 1 minute and 55 seconds, three of Kang's family entered the elevator. Cough will produce droplets, which will settle in the air for a long time, but the droplets cannot settle for more than one minute. After Kang's family enters the elevator in such a short time, there will be possible aerosols and non-settled droplets in it, causing Kang's infection. The more critical detail here is that Kang did not wear a mask. If Kang wore a mask at that time, this situation might be avoided and his probability of infection would be reduced. Unfortunately, Kang did not wear a mask when he entered the elevator. The epidemiological correlation between Kang and Wang is connected in series.

　　How is the connection spread between building 4 and building 19?

Through epidemiological investigation, it is found that there is a cross of personnel in building 9. in building 9, there are workers of Wang mou, infected in building 4, and colleagues of Shen mou, who work in building 19.

Public security officers and disease control personnel stayed up for two consecutive nights, and finally found a clue: Wang Mou, the first infected person found in Building 4, went to visit on the night of November 9, and he went to Building 9 to find him. colleague. He not only dropped in, but also had little movements in the elevator, coughing, sneezing and not wearing a mask.

On November 10, Shen took the elevator to building 9 to find his colleague and returned to building 19. on the afternoon of the 10th, Shen's colleague who lived in building 9 went to building 19 for dinner.

According to the test, the elevator table sampling in Building 9 tested positive for the new coronavirus nucleic acid, and it was positive at multiple points.

　　Analysis of Infection Chain in Building 19 of Overlooking Haixuan Community

The colleague of Shen mou who lives in building 9 goes back and forth between building 19 and building 10, because this is Shen mou's boss, and his company's office is located in building 19, which is likely to bring the virus to building 19 through his hand pollution or other pollution machinery. at the same time, Shen mou himself also goes back and forth between building 9 and building 19.

After an in-depth analysis of the epidemic situation in Hailian Cold Storage and Kan Haixuan Community, Zhang Ying, deputy director of the Municipal Center for Disease Control and Prevention, also reminded the public of some epidemic prevention and control at the press conference:
       First, when you enter a confined space like an elevator, you must wear a mask, and you must wear a mask in public places.

Second, pay attention to hand hygiene. What is the main reason for mechanical transmission? It is mainly by hand. If you touch it, you don't disinfect it, you don't clean it, and then rub your nose and rub your eyes, which may infect you. Therefore, it is repeatedly emphasized that after washing hands and touching the pollutants from public places, the first thing to do is to disinfect the hands.

Third, pay attention to hygiene and etiquette. You see, Wang coughs and sneezes in the elevator. If he has such a shelter, he will not pollute the elevator. Therefore, it is very important to pay attention to hygiene and do not spit everywhere. When winter comes, there are many symptoms of respiratory tract infection. At this time, you must use paper towels to spit and blow your nose. After you use it, you should throw it into the trash can. Don't throw it away at will. Pay attention to civilized etiquette.

Another point is just to introduce a detail to you, the stevedore's rest area three bed sheets are positive for viral nucleic acid, so in winter ultraviolet rays are very good, we have to often take out the bedding to bask in ultraviolet rays, not only can kill the new coronavirus, including other pathogenic microorganisms it can kill inactivated.

Once again remind everyone to wear masks when going out and wash their hands and disinfect when entering.

Source: Netease Han News

Website:https://dy.163.com/article/FS929LK80530Q6HV.html

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