(Fighting New Coronary Pneumonia) The Chinese Expert Group for Joint Research on the Traceability of New Coronavirus: Actively dispel doubts and refute unfounded doubt
China News Service, Beijing, March 31 (Reporter Li Chun) On the 30th local time, the World Health Organization released a China-WHO Covid-19 Joint Research Report in Geneva.
The Chinese expert group of the joint research on traceability held a press conference in Beijing on the 31st. Chinese experts explained their doubts on the issue of virus traceability, and also refuted some unprovoked doubts about the hard work of Chinese and foreign experts.
"Extremely Impossible" to be introduced through the laboratory
According to Liang Wannian, the leader of the Chinese expert team for this joint study, the South China Seafood Market is one of the outbreak points of the new crown epidemic, but at the same time, the spread may also occur in other places in Wuhan.
The market may introduce the virus through cold chain products, animals or animal products contaminated by infected persons.
Large-scale testing of animal products in this market did not find positive.
Cold chain products have not yet been tested.
Liang Wannian also introduced that no new coronavirus was found in bats in Hubei Province and a large number of livestock, poultry, and wild animals in various parts of China, and no evidence of new coronavirus circulating in livestock, poultry and wild animals before and after the outbreak was found.
The joint expert group has also scientifically evaluated the possibility of the four introduction routes of the new coronavirus, and believes that the direct spillover of zoonotic diseases is a “probable to more likely” route, and “more likely to very likely” to be introduced through an intermediate host. "It is extremely unlikely to be introduced through the laboratory through the introduction of cold chain and food chain products.
There is no precedent for perfect and successful traceability of human beings
"Judging from the history of human struggle against new infectious diseases, we have not yet found a very perfect precedent for successful traceability." Liang Wannian said that traceability is a very complex scientific problem, and one study cannot be expected to solve all the problems of traceability. .
But every research, every conclusion and report that will bring people closer to the truth.
Where is the source of the virus difficult?
Liang Wannian pointed out that, first of all, the virus infects humans from animals or a certain vector, and it is “a needle in a haystack” to find such an accident.
Another major difficulty lies in the "cunning" of the new coronavirus: it is easy to mutate and causes more types of disease symptoms. Mild patients have atypical symptoms, and a considerable number of people are asymptomatic infections.
Wuhan reported the first case of new coronary pneumonia on December 8, 2019.
Liang Wannian pointed out that this case is the first case discovered, but it is not necessarily the "case zero" that the virus traces to pursue.
If it is a hidden infection, a patient with atypical symptoms, or even no symptoms after infection, this "case zero" may not be found.
The argument that "China did not provide original data" is not valid
Regarding the doubts about the outside world, Chinese experts also actively explained their doubts and refuted unfounded accusations.
Regarding "China did not provide the original data to the expert team", Liang Wannian said that this statement "is not valid."
Experts from both sides work together and "research with a high degree of integration", and there is no difference in the information they have.
"Of course, some data cannot be taken away or photographed according to Chinese laws." Liang Wannian said, "but when we analyzed together in Wuhan, everyone could see our databases and information, and they were all done together. "
Regarding the "postponement" of the research report, Liang Wannian even pointed out that "this concept has not been established."
For every sentence, every conclusion, and every data, the expert group must carefully verify and sort out each paragraph, and make logical judgments and inferences between each paragraph to judge whether it is scientifically reasonable.
"So it's not because of some'interference', it's not because of scientists''laziness', and it's not because of other reasons that this report is'postponed'. We are ensuring the quality, making it more scientific and perfect." Finish)