‘Unintentional’ leak from Wuhan lab is source of Covid, says US Senate report

by time news

2023-04-29 10:30:00

VIRUS – Le SARS-CoV-2 a “involuntarily” leaked from a Chinese lab. These new conclusions come to us once again from the United States, this time from the Senate. In a report released Monday, April 17, 2023, the upper house of the US Congress asserts that a “bio-containment failure” during research on a vaccine against SARS-CoV-2 is causing “an unintentional incident”. THE “Available evidence supports the theories of a lab leak”, conclude the authors of this report after 18 months of investigation.

The rapport, which updates an initial version released in the fall of 2022, was introduced Sunday, April 16, 2023, by Republican Senator Roger Marshall, a member of the Senate Health Committee. The 301-page document was produced with Dr Robert Kadlec, a former health official and one of America’s leading figures in the fight against the Covid-19 pandemic under the Trump administration.

The senator explained that the investigators had two hypotheses. The first pleads for a natural zoonotic origin, that is to say that the virus appeared in animals before being transmitted to humans. According to the second hypothesis, the appearance of Covid-19 is due to a laboratory leak at the Wuhan Institute of Virology in China, where, it will be recalled, the first cases of contamination were detected.

Bio-containment gaps causing the leak?

During its briefingRoger Marshall claimed that investigators “exhausted all the evidence they could find, all the witnesses they could talk to, to come to conclusions”. These are categorical: “The preponderance of circumstantial evidence supports an unintended research-related incident.” None of the available evidence supports the natural origin theory, the report concludes. The document nevertheless clarifies that the data required to support a natural zoonotic source depends on the information provided by China, “which are incomplete or contradictory”.

The investigators even put forward hypotheses about this unintentional incident, which would be a “aerosol leak” who infected the laboratory staff or a “virus release to the environment due to bio-containment failure”.

The second possibility is particularly justified by the identification within the laboratory of safety problems before the Covid pandemic. The report is based on documents relating to the modernization of the laboratory, which in 2019 mentioned the possibility that cleaning agents had caused corrosion of welded joints. According to the US Senate, these patents referred to “defects in transfer cabinets, autoclaves (sterilization devices, editor’s note), airtight doors and excessive corrosive disinfectants that affected stainless steel laboratory equipment and bio-containment structures”.

The state of the Wuhan Institute of Virology was already causing concern. In 2018, a telegram sent from the US Embassy in China to the State Department reported a “severe shortage of technicians competent to operate a level four biosafety laboratory”.

In addition, the laboratory had already communiqué, well before the pandemic, on his experiments on rats, bats or palm civets to detect coronaviruses capable of infecting humans. Experiments partially subsidized by the United States through the National Institutes of Health (NIH), one of their agencies and the NGO EcoHealth Alliance. Grants suspended in 2020due, among other things, to biosecurity gaps from the Wuhan laboratory.

Rather “two leaks” than one

Among the information supporting the theory of a lab leak is the lab’s November 2019 attempt to procure a lab incinerator. The Senate report concludes “some concern about the risk of escape of infectious aerosols”. In the same month, it continues, staff members of the Wuhan Institute of Virology underwent remedial biosafety training.

Senator Roger Marshall’s report even states that “two lab leaks” took place in Wuhan. Chinese researchers told investigators that data on infections in Wuhan at the start of the pandemic show different epidemiological trends. The first strains of Covid-19 showed differences, including a different number of mutations, “suggesting that two lineages of the same virus could have emerged simultaneously and progressed on different paths or been separated sequentially by a certain period. One lineage had more mutations than the other, implying that it had circulated longer than the other or potentially crossed more individuals, the report believes.

Dr Robert Kadlec and his team believe that a first leak may have occurred before September 2019 then a second took place at the end of 2019, “just before Chinese researchers are likely to start developing a Covid-19 vaccine that has been tested starting in February 2020.”

During its briefing, Senator Marshall acknowledged that there could have only been one leak despite the existence of evidence that supports the theory of two leaks. He cites how genomic data from the Wuhan Institute was taken offline in the fall of 2019, the same time foreign military athletes who traveled to that city in Wuhan for the Military Olympics fell. patients with symptoms “compatible” with Covid-19.

In this regard, the US representative took the opportunity to deplore his team’s difficulty in obtaining evidence. “Many of the gaps in the global understanding of the emergence of SARS are the result of censorship and the deliberate destruction and concealment of evidence” by the “Chinese Communist Party.”

He told Fox News on April 18 that “China had already crafted a response to the coronavirus several months before the rest of the world learned of its existence.” The report points to the report, by American diplomats in Wuhan in October 2019, of a seasonal flu “vicious”, an increase in hospitalizations during the same period or the closure of schools in the same Chinese city.

“It’s unintentional”

The report concludes that the available evidence supports a lab leak rather than an intentional incident, “despite contact between the Wuhan lab and senior Chinese Communist Party officials.” “I think there are people who assume the worst, and there’s just no evidence that it was intentional,” Mr Marshall said. “All the evidence points to it being unintentional”he said during the briefing.

In contrast, none of the available evidence supports the natural origin theory.

At the end of February, the United States Department of Energy announced that it now considered the laboratory leak to be the origin of Covid-19. “most likely”.

Two days later, the Federal Bureau of Investigation (FBI) followed suit with the US Department of Energy. “The FBI has believed for some time now that the origin of the pandemic is most likely linked to a laboratory incident in Wuhan”said its director Christopher Wray on February 28, referring to Fox News “a potential leak from a laboratory controlled by the Chinese government”.

On Friday, March 10, the United States Congress passed a law ordering the declassification information about the origin of the virus.


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