China CDC Wu Zunyou: Epidemic prevention and control cold chain can not be dropped chain

November 7, Tianjin Binhai New Area received a notification from the city of Texas, Shandong Province, that the new coronavirus nucleic acid tested positive for packaging samples of frozen food imported from outside Tianjin. Subsequently, Tianjin reported that a stevedore was confirmed to be infected with the new coronavirus. On November 9th, Tianjin added an asymptomatic patient, a truck driver who had been to the cold kula cargo where the confirmed case was found. At present, Shandong Texas, Shanxi Taiyuan, Hebei Baoding and other outbreak-related goods flow into the area is stepping up the investigation. Since June this year, at least 10 provinces have tested positive for the new coronavirus in cold-chain frozen products.
the cold chain link become the "hidden place" of the new coronavirus? What prevention and control experiences have we learned from the relevant outbreak response? Autumn and winter are the season of high incidence of infectious diseases, how to do a good job in cold chain link epidemic prevention and control? This reporter interviewed Wu Zunyou, chief epidemiologist at the China Center for Disease Control and Prevention.Reporter: November 8, Tianjin reported a new local confirmed case of 1 case, is a refrigeration company loading and unloading workers, after many times in the cold chain frozen products tested positive for the new coronavirus. Why has the cold chain repeatedly become the "hidden place" of the new coronavirus?
: Unlike pathogenic microorganisms such as parasites and bacteria, viruses do not freeze to death at low temperatures such as minus a dozen degrees Celsius. In general, the lower the temperature, the longer the virus will survive. If the virus is placed in an environment of minus 180 degrees Celsius, such as liquid nitrogen, it could survive for decades or even hundreds of years. The cold chain creates a low-temperature environment that provides a good living space for viruses.
the temperature of the cold chain, the virus survives differently. In general, viruses can survive for months in environments of minus 20 degrees Celsius. Even with normal cold-chain transport, the virus can survive for weeks. If the contaminated items, including food or packaging, are transported through cold chains in areas with a high risk of neo-crown outbreaks, the virus can be brought to non-epidemic areas, thus causing contact spread and detonating new crown outbreaks.: In the process of epidemic prevention and control, how can the cold chain link step by step attract the attention of relevant departments? What findings have played a positive role in epidemic prevention and control?
: The cold chain has attracted the attention of relevant departments, first of all, the outbreak in Beijing's new areas. Analysis of the new crown outbreak in the new area found that the cases are mainly concentrated in the aquatic products business area, and the environment in this area is the most seriously polluted by the new crown virus. These findings suggest that the outbreak in Beijing may be related to sea products. At the same time, it was found that the outbreak was not serious in warm aquatic products such as live fish.
the early outbreak in Wuhan at the beginning of the year, and in the South China seafood market, patients are also mainly concentrated in frozen seafood areas. These clues point to the cold chain transport of imported sea products, which may be the source of the outbreak. Following this line, it was found that the products imported by several countries were contaminated with the new coronavirus.
, customs in several cities across the country tested positive for imported frozen sea products or meat products and found that the nucleic acid of the new coronavirus had tested positive. There is growing evidence that frozen sea products or meat may have brought viruses from affected countries into our country. These findings, so that the customs and other departments to strengthen import testing, market supervision and health departments throughout the country have also strengthened the local cold chain food supervision.: Previously, the outbreaks in Beijing, Dalian and Qingdao were all related to the cold chain link. What are the characteristics of handling several emergencies? What useful prevention and control experiences have we learned from them?
: The outbreak in Beijing has made us pay attention to frozen products transported in the cold chain for the first time. This is also the world's first discovery and confirmation: contaminated food through the cold chain transport, can trigger a new crown outbreak across the border. This makes us realize that foreign imports, but also pay attention to foreign goods, especially strictly prevent food transported through the cold chain to bring the new coronavirus into the country, causing a new outbreak.
dalian outbreak once again proved that cold chain transportation of food contaminated with the new crown virus, can trigger a new crown outbreak. These outbreaks directly contributed to the strengthening of China's cold chain operation of frozen meat and products practitioners management.
qingdao outbreak is the initiative to the cold chain practitioners regular monitoring, found in the early stages of infection asymptomatic infected people, so did not form a larger range of spread.
three outbreaks in Beijing, Dalian and Qingdao, which were detected earlier and smaller and smaller together. This is the result of our constant learning and lessons learned. These experiences are summed up by regular environmental testing of the cold chain industry and nucleic acid screening for practitioners not less than once a week, in order to detect early-stage infections and control the outbreak in its infancy.: November 9,
Joint Prevention and Control Mechanism issued the "Import cold chain food preventive comprehensive disinfection work programme", how to evaluate the practical significance of this program?
: This document is an important policy document for the normalization of China's new crown prevention and control. After the discovery of a number of local outbreaks of new crown pneumonia caused by imported cold-chain food, the state did not simply and hastyly prohibit the import of cold-chain food, but to control the imported cold-chain food pollution may cause the new crown outbreak into normal management, to control the risk to the lowest level, in order to ensure the import of cold-chain food safety, to ensure the health and safety of the people, but also to improve the efficiency of port clearance, to ensure the stability of the supply chain supply chain to provide policy support.
: autumn and winter need to strictly prevent the outbreak of the re-ed, how to do a good job in the cold chain link of epidemic prevention and control? What advice do you have for this? What wake-up call did this new case in Tianjin give us?
Wu Zunyou: grasp the cold chain link epidemic prevention and control, to do a good job of three testing work, one is to import products and packaging sampling testing, in order to find contaminated food in a timely manner;
In management, on the one hand, to train all cold chain industry managers and practitioners, strengthen the implementation of normal prevention and control measures, on the other hand, to regularly the cold chain industry new crown epidemic normalization prevention and control measures to carry out supervision and inspection, find weak links, timely block the risk point.