Xu Wenbo: Cold chain to the old and new coronavirus for months or years secretly spread

, there have been many COVI9-19 cluster cases of the initial source of cold chain, the new coronavirus through cold chain transmission has become a new focus of epidemic prevention and control.
" new coronavirus contaminated products may become a hidden path for the spread of the new crown, the virus stored in cold storage for months or even years after the relevant staff may be infected. At the 2020 6th Lancet-China Medical
Medical and Health Conference, Xu Wenbo, director of the CDC's Viral Disease Prevention and Control Institute, said this would eventually lead to the secret spread of the "relatively old" new coronavirus, which has been stored for a long time.
wu Zunyou, chief epidemiologist at the China Center for Disease Control and Prevention, said earlier that unlike pathogenic microbes 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.
Xu Wenbo delivered a keynote speech at the conference on "Cold chain products contaminated with new coronavirus through logistics over long distances", noting that in the case of COVID-19 transmission, most of the previous transmission through close contact, sometimes through air, and a few cases showed that COVID-19 can be transmitted through the surface contaminated by the new coronavirus, of course, this has not been completely determined before. In addition, existing studies have shown that COVID-19 can be transmitted between humans and some animals.
From the previous wave of domestic outbreaks, the outbreak in Beijing's new areas for the first time caused concern about cold chain transport of frozen products, this is the world's first discovery and confirmation: contaminated food transported through the cold chain, can trigger a cross-border outbreak of the new crown. The Dalian outbreak has also proved once again that cold chain transportation of food contaminated with the new crown virus can trigger a new crown outbreak. The possible source of the outbreak in Qingdao was eventually identified as two dockworkers in Qingdao Port.
Xu Wenbo said the source and cold chain-related outbreaks pose several challenges. First, imported cold-chain products will be contaminated by the newly crowned infected staff, and the virus load is relatively high; A hidden path of new coronavirus, where the virus can still infect workers for months or even years after being stored in cold storage, leading to the secret spread of the "relatively old" new coronavirus;
Xu Wenbo at the same time put forward corresponding countermeasures, first, the global cold chain staff to strengthen the monitoring of the new coronavirus, prevention and control of product contamination by the virus;