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Original title: The possibility of a laboratory leak in Wuhan is extremely low. This press conference mentions 5 key messages
There is insufficient evidence to confirm that the population transmission of a new coronary pneumonia occurred in Wuhan before December 2019.
Liang Wannian, Chinese joint expert group leader and executive vice president of the Vanke School of Public Health and Health at Tsinghua University, presented that to determine the potential impact of the new coronary pneumonia pathogen on morbidity in the months before the outbreak. , the research team had reviewed adult sentinel surveillance data from influenza-like patients and SARI surveillance data from a hospital in Hubei province. The study results showed that in the second half of 2019, there were no unrecognized records of circulation of the novel corona pneumonia virus of a certain scale in Wuhan. Details >>>
WHO expert: the possibility of the Wuhan epidemic caused by laboratory leaks is very low
Peter, the leader of the foreign think tank, said the most likely path for the new coronavirus to infect humans is through the intermediate host. China has already conducted more bat surveys, but other countries also have species such as bats, which should also be studied in the future. Also, Wuhan is not a place where bats gather in large numbers, so the epidemic in Wuhan is unlikely to be transmitted from bats to humans at first, but it can be transmitted by other animals.
Regarding the leakage of laboratory viruses, he thinks the possibility is very low. He introduced that when evaluating various hypotheses, relevant supporting and opposing arguments will be listed and evaluated. In fact, there is a hypothesis that supports laboratory leaks, because similar incidents have occurred in various parts of the world in the past, but there is also evidence against this argument. For example, prior to the outbreak, no similar research had been publicly published. In addition, the team of experts and related laboratory management staff discussed and inquired, and went to the Wuhan Institute of Virology to visit their P4 laboratory, thinking that it is impossible for the virus to escape from the laboratory. This judgment is based on rational testing and analysis, not subjective feelings.
Chinese expert Liang Wannian said that laboratory leaks are but two forms, artificial synthesis or virus leaks. Artificial synthesis has long been shown to be impossible and there are no new coronaviruses in the laboratory. What about leaks? Therefore, based on current knowledge and judgment, laboratory leaks are extremely unlikely. Details >>>
WHO Traceability Expert: No Animal Sample Tested Positive in South China Seafood Market
According to foreign experts, no positives were found in animal samples tested in the southern Chinese seafood market. Among the large number of animals on the market, some may be susceptible to the new coronavirus, such as bamboo rats, rabbits, and ferret badgers. Furthermore, the traceability also includes related suppliers, breeding farms, regions, etc. Some places have bat-related viruses. However, these studies will provide more clues. Details >>>
The circulation of the new coronavirus may be several weeks before the initial detection of the case does not rule out a missing diagnosis in some regions of the world
Liang Wannian, Chinese team leader of the joint expert group and executive vice president of the Vanke School of Public Health and Health at Tsinghua University, presented that through some literature reviews, the published research literature and some data indicating early circulation. of the new coronavirus. Research data from different countries found that the circulation of the new coronavirus may be several weeks before the initial detection of cases, and the detection time of some positive suspicious samples even earlier than some first reports of related cases, which also suggests that some areas can not be ruled out Missed diagnosis. These so-called missed diagnoses are closely related to the characteristics of the disease and the virus. This is our basic judgment based on the analysis of relevant global data. Details >>>
China-WHO Traceability Expert Group: South China Seafood Market May Be Just One Point Of Virus Spread
According to Liang Wannian, Chinese Leader of the Joint Expert Group and Executive Vice President of the Vanke School of Public Health and Health at Tsinghua University, based on previous data analysis, most cases were reported in the second half of December 2019 Many early cases were related to Huanan Seafood The market is related, suggesting that this market may be one of the spreading points of the virus, but at the same time, the spread may also occur elsewhere in Wuhan.
Based on current information, it is still impossible to determine how the new coronavirus entered the South China seafood market.
In December 2019, the spread of the infection may have occurred in Wuhan. In view of the fact that some early cases are related to the South China seafood market, some cases are related to other markets, and some cases have nothing to do with any market, we preliminarily determine that the seafood market is likely South China is a point of spread of the virus, but at the same time there seem to be other places in Wuhan.There may be transmission phenomena. Based on the current data, it is impossible to determine how the virus entered the South China seafood market or other markets. Details >>>
Editor Chang Jiang corrected Li Shihui
