Imported non -cold chain items are no longer "nuclear acid": it is difficult to "pass the person" at room temperature?

On July 12, the "Notice on Further Optimizing the Prevention and Control of the New Crown Pneumonia's Epidemic Epidemium" (hereinafter referred to as the "Notice") issued by the State Council's joint prevention and control mechanism comprehensive group was issued. Virus nucleic acid test.

The "Notice" pointed out that the latest research results show that under normal temperature conditions, the new crown virus survives on the surface of most items, and all of them will be lost within 1 day. The "Notice" also clearly states that according to the situation of the epidemic prevention and control and virus mutation, based on the scientific conclusions of the "Things" system research, due to the continuous optimization and dynamic adjustment of the situation, scientific and precisely adopt imported non -cold chain new crown virus virus Epidemic prevention and control measures.

This is to "ensure the safety of imported items, implement the requirements of 'epidemic situation to prevent, stabilize the economy, and develop safely', and ensure the stability of the industrial chain and the supply chain."

The systematic research and understanding of "things to the person" is always progressing. This time, the joint prevention and control mechanism of the State Council was clear. Under normal temperature, the new coronary virus was inactivated within 1 day on the surface of most items. It may not only affect the prevention and control measures for imported non -cold chain items.

Qian Hua, a professor at the School of Energy and Environment of Southeast University and deputy chairman of the indoor environment and health branch of the Chinese Environment Society, pointed out in an interview with Red Star Journalists that the probability of new crown viruses at normal temperature is already a fixed conclusion. In the past, for safety reasons, the epidemic prevention efforts were high. At present, it is just returning to the normal state without having to worry too much. Virusian Chang Rongshan also told Hongxing News that the need for large -scale nucleic acid detection and disinfecting of imported items was not large. The cost was too high and the return was relatively limited.

↑ In December 2021, Xining's epidemic prevention personnel sample nucleic acid testing on cold chain foods. Data diagram according to icphoto

Policy adjustment-

Imported non -cold chain items cancel nucleic acid detection

"All imported non -cold chain items are no longer disinfected, and the imports of imported cold chain foods have also changed."

The principle determined by the "Notice" is to comprehensively judge the risk of pollution of items according to the country (region) of imported non -cold chain items, categories and characteristics, transportation methods and duration, and loading and unloading methods. Or release measures.

Red Star reporter noticed that this principle is the requirements of the ninth edition of the ninth edition of the new coronary virus pneumonia prevention and control schemes released last month. However, at the time, the plan still proposed that the national non -cold chain items from the serious outbreak were properly sampled.

The "Notice" divides the risk of imported non -cold chain items into two levels of risk and high risk. Except for high -risk imported non -cold chain items, high -risk imported non -cold chain items and low -risk imported non -cold chain items that are not suitable for preventive disinfection do not implement new crown virus nucleic acid detection and preventive disinfection.

The "Notice" also emphasizes that all localities should hurry up to adjust the relevant regulations, and it is not allowed to introduce the import measures to import non -cold chain items and strict control measures.

At the press conference of the State Council's joint prevention and control mechanism on July 8, Li Zhengliang, deputy director of the Department of Health and Quarantine Department of the General Administration of Customs, has introduced some work to optimize and improve the prevention and control of imported cold chain food port epidemic. He said that the customs further strengthened the source and control of the exporter. From the perspective of the national port detection, although the global epidemic was high and the epidemic in some countries and regions rebounded, the number of positives in imported cold chain foods has recently declined significantly.

At the same time, the "Notice" proposes that the positive overseas food manufacturers who detect cold chain foods will no longer implement emergency preventive measures for suspension of import declarations. Li Zhengliang introduced that this can further improve the efficiency of port clearance while ensuring the effectiveness of monitoring and detection.

Earlier this year, according to the changes in the epidemic and prevention and control situation, the National Health Commission also organized the revision of the "Guide to Prevention and Control Technology of Cold Chain Food Production and operation and operation and operation of the new crown virus" and "Disinfection Technology Guide".

↑ Related notice web screenshot

Multiple studies-

It is difficult to confirm the "things to the person", and other ways need to be excluded

"The risk of general public contact or consumption of cold chain foods is very low."

Since 2020, after importing cold chain foods, the risk of importing viruses that spread viruses of non -cold chain items have also been vigilant in many places. There have been epidemics that may be infected with overseas items in many places.

In response to the epidemic related to the receiving and receiving international mail in January this year, the Beijing and Haidian District Disease Control Center later published papers to demonstrate their possibilities and found that the virus gene sequence of virus genes infected with cases and overseas emails they contacted. And the positive email gene sequence that has not been unpacked to another place is highly the same as the same.

As a result, there have been many places to release the prevention and control measures for international express delivery related outbreaks, and also reminded the public that it is not necessary to be unnecessary. Mail express epidemic prevention and control disposal plan. There are also many people in Shenzhen because of Haitao's yellow code, and some people have to test 3 times in 7 days without courier. (Previously reported: Shenzhen multiplayer changes to the yellow code due to Haitao's health code! Disease control reminders to reduce purchase of overseas goods) On February 9th, Shenzhen specially issued the "Guidelines for the Prevention and Control of Overseas Entered Input Establishment", requiring the scope of the city in the city Strengthen the prevention and control of entry email express epidemic.

↑ On March 14, 2022, Shenzhen Huaqiangbei Market Evaporation was upgraded to implement closed management prohibited entry. Data diagram according to icphoto

The latest imported cold chain food nucleic acid testing data was released on May 23. The press conference of the State Council joint defense and control mechanism was released. Increase the proportion and quantity of sampling detection. As of the previous week, there were 4.87 million sample samples of customs samples across the country, and 1,384 nucleic acid positive was detected. A study published in June of the National Food Safety Risk Evaluation Center in June this year at the "China Centers for Disease Control and Prevention" and the author of the communications author as the center, Li Ning, which analyzed the collection of more than 55.83 million copies from July 2020 to July 2021 from the cold chain. Food/food packaging, environment and related practitioners' samples (of which 20.51 million copies from cold chain food/food packaging) were detected, and 1455 were positive (0.0026%). In 1398 positive food/food packaging, 99.50%(1391/1398) was imported. The article said that this is the first report of the annual monitoring of cold chain food -related samples.

However, none of these data reported that the CT value of the virus load and whether the virus was separated.

Virus expert Chang Rongshan once pointed out in an interview with Red Star reporters that positive only indicates that the detection of nucleic acid fragments (that is, the virus corpse) does not mean that there is a living virus in the sample. ; Even if there is a living virus with infection ability on items, it is necessary to reach a certain number, and under certain conditions to infect people with contact with items.

"It is not the touch of things and the person itself, which will cause infection. The virus must be exposed to human ciliary membranes, nasal mucosa, or entering the respiratory tract by suspension." Qian Hua, deputy chairman of the Indoor Environment and Health Branch of the China Environmental Society, also pointed out to Red Star Journalist.

It is difficult to confirm in research because it is difficult to rule out other ways. In October 2020, the official website of the China Centers for Disease Control and Prevention released news that detecting is separated from the living virus from the outer packaging positive sample of the imported frozen cod from the Qingdao epidemic. New crown virus. The China Centers for Disease Control and Prevention also stated that in the previous cold chain food nucleic acid sampling, the positive rate was extremely low, the virus nucleic acid load was low, and the live virus was not separated. The risk of infection of ordinary public contact or consumption of cold chain foods is also very low.

In the papers published in April this year, the simulation analysis of the university environmental samples showed that the probability of infection in the surface of positive objects was once 100,000 times. In the scientific briefing in April 2021, the U.S. Centers for Disease Control believes that the risk of each touching infection is roughly less than one tenth.

The press conference of the State Council ’s joint prevention and control mechanism has repeatedly responded to“ things to be passed down ”, which emphasized that“ things pass ”are possible, but the general risk is small, not the main way of spreading the epidemic. Wu Zunyou, chief expert of the Popular disease of the China Disease Prevention and Control Center, has introduced that Omikon is both infection of the lower respiratory tract and the upper respiratory tract infection. The upper respiratory tract infection is relatively polluted on the surface of the surrounding environment.

He Qinghua, a first -level inspector of the National Health and Health Commission's Disease Control Bureau, responded in January this year that expert research and judgment analysis believes that non -freezing entry items have insufficient evidence of domestic personnel infection and need to be further studied. Existing research shows that the new coronary virus on the surface of polluting items under normal temperature conditions will degrade and lose infection activity in a short period of time. The time to survive on paper towels and printed materials is short, generally not more than 24 hours.

Materials, temperature, humidity, etc. can affect the time of virus survive on the surface of the object. At home and abroad, the new coronary virus can have a lot of research on the surface of different items, the experimental conditions are different, and the virus can survive for several hours to several days.

A pre -printed study of the University of Hong Kong's team in March believes that Omikon is more stable on the smooth and porous surface than the primitive plant on the surface. You can still detect the infectious Omikon virus.

However, the ideal laboratory environment is very different from the real environment. Considering the survival data of objects and real -world communication factors, the US Centers for Disease Control and Prevention believes in the above briefing that the risk of "things" after 3 days after the infected person's interior.

Experts say-

There is a conclusion: the probability of "things preacher" at room temperature is extremely low

"The possibility of the virus through the‘ Things Chuanren ’is only 400 to 1,000 of the‘ He Chuanren ’”

Does the promulgation of this notice mean that we can completely relax the vigilance of "things"? Red Star reporter consulted Qian Hua on this, and he pointed out that the probability of "things" at normal temperature at room temperature is extremely low. In the past, for safety reasons, the epidemic prevention efforts were high. At present, it is just returning to the normal state without having to worry too much.

For the virus survival time of "1 day", Qian Hua said that the conclusion has always been there and has not changed. "Before the beginning of the new crown, our mask was not enough. I just took off the mask and put it outside for two days before continuing to bring it. At that time, I knew that the virus would not survive for more than two days. Fast. "

Chang Rongshan also told Hongxing News that the possibility of viruses through "people" is only 400 to 1,000 in "people". The cost is too high, and the return is relatively limited. So, will the domestic express logistics chain be canceled after a nucleic acid detection? Chang Rongshan believes that in the future, domestic express transportation should also gradually cancel the detection and preventive disinfection of the outer packaging, reduce unnecessary costs. He said that it was indeed unnecessary to destroy all fruits and food as soon as a positive and food was detected in fruits and food. "If the items are contaminated by the new crown, we can rush it off with water first, and the second can be boiled with high temperature. For individuals, the last thing is only sanitary issues, not epidemic prevention."

Qian Hua believes that similar incidents eventually saw costs. If the risk to be undertaken by the epidemic prevention department is more than the cost of destruction, although the probability of presence of things is extremely low, people will also tend to destroy all the food involved.

As for the risk of cold chain transportation, Chang Rongshan believes that the new coronary virus still maintains activity under -20 ° C, and the preventive disinfection of cold chain transportation is still necessary. Qian Hua specially reminds that you should pay special attention to the winter that is closer to the cold chain environment. You don't have to worry too much about the rest of the season in normal temperature.

Red Star reporter Hu Yiwen intern Zhang Xiaoshang Beijing reported Beijing

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Related reports:

National Health and Health Commission: no longer detect the imported non -cold chain items nucleic acid testing

The State Council joint prevention and control mechanism: It is not allowed to introduce imported non -cold chain items to plus strict control measures

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