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[57]National [58] Coronavirus Revealed: Wuhan and US scientists planned to create new coronaviruses Sarah Knapton21:55, Oct 06 2021 * * * * * [59]Scientists from Wuhan and the US were planning to create new coronaviruses that did not exist in nature by combining the genetic codes of other viruses, proposals show. Documents of a grant application submitted to the US Defense Advanced Research Projects Agency (Darpa), leaked last month, reveal that the international team of scientists planned to mix genetic data of closely related strains and grow completely new viruses. A genetics expert working with the World Health Organisation (WHO), who uncovered the plan after studying the proposals in detail, said that if [60]Sars-CoV-2 had been produced in this way, it would explain why [61]a close match has never been found in nature. So far the closest naturally occurring virus to Sars-CoV-2 [62]is a strain called Banal-52, which was reported from Laos last month and shares 96.8 per cent of the genome. Yet scientists expect a direct ancestor to be around a 99.98 per cent match – and none has been found so far. READ MORE: * [63]Inside the Wuhan lab: Home of dangerous pathogens and a Covid mystery * [64]Scientists battle over the ultimate origin story: Where did the coronavirus come from? * [65]'I have nothing to fear': Top Chinese virologist denies Wuhan lab leak theory in rare interview * [66]The Detail: Why experts are re-examining the Covid-19 'lab leak theory' * [67]WHO investigator rubbishes Covid-19 laboratory leak theory * [68]Covid-19: WHO team arrives in Wuhan to search for pandemic origins The Darpa proposals, leaked to the pandemic origins analysis group Drastic, show the team had planned to take sequences from naturally occurring coronaviruses and use them to create a brand new sequence that was an average of all the strains. The grant application, submitted in 2018, states: “We will compile sequence/RNAseq data from a panel of closely related strains and compare full length genomes, scanning for unique SNPs representing sequencing errors. The Wuhan Institute of Virology in China. AP The Wuhan Institute of Virology in China. “Consensus candidate genomes will be synthesised commercially using established techniques and genome-length RNA and electroporation to recover recombinant viruses.” Explaining the proposal, a WHO collaborator, who has asked not to be named for fear of reprisals, said: “This means that they would take various sequences from similar coronaviruses and create a new sequence that is essentially the average of them. It would be a new virus sequence, not a 100 per cent match to anything. “They would then synthesise the viral genome from the computer sequence, thus creating a virus genome that did not exist in nature but looks natural as it is the average of natural viruses. “Then they put that RNA in a cell and recover the virus from it. This creates a virus that has never existed in nature, with a new 'backbone' that didn't exist in nature but is very, very similar as it's the average of natural backbones.” The source said it was noteworthy that the cut-off for generating such an average sequence was viruses that only had five per cent genetic divergence from each other. Last year, scientists at the Wuhan Institute of Virology said they had found a strain named RaTG13 in bat droppings in a cave in Yunnan province in 2013 which was a 96.1 per cent match to Sars-CoV-2. It means RaTG13 could have been included in a set of viral genomes to help create an average sequence. The World Health Organisation’s Peter Ben Embarek holds up a chart showing pathways of transmission of the virus during a joint news conference at the end of the WHO mission in Wuhan, China. Ng Han Guan/AP The World Health Organisation’s Peter Ben Embarek holds up a chart showing pathways of transmission of the virus during a joint news conference at the end of the WHO mission in Wuhan, China. Although the grant proposal was rejected in 2018, the Wuhan database of viral strains was taken offline prior to the Covid outbreak some 18 months later, meaning it is impossible to check which viruses the team was working on or had created. [69]Wuhan scientists have consistently denied creating Sars-CoV-2 in a lab. The WHO source added: “If Sars-CoV-2 comes from an artificial consensus sequence composed of genomes with more than 95 per cent similarity to each other … I would predict that we will never find a really good match in nature and just a bunch of close matches across parts of the sequence, which so far is what we are seeing. “The problem is that those opposed to a lab leak scenario will always just say that we need to sample more, and absence of evidence isn't evidence of absence. [70]Scientists overall are afraid of discussing the issue of the origins due to the political situation. This leaves a small and vocal minority of biased scientists free to spread misinformation.” The proposal was submitted by the British zoologist Peter Daszak on behalf of a consortium which included Daszak EcoHealth Alliance, the [71]Wuhan Institute of Virology, the University of North Carolina and Duke NUS in Singapore. Researchers at the Wuhan Institute of Virology have rejected any suggestion the coronavirus came from their laboratory. Chinatopix/AP Researchers at the Wuhan Institute of Virology have rejected any suggestion the coronavirus came from their laboratory. The plans are in addition to other proposals made in the Darpa documents, including inserting a section into existing viruses to make them more infectious to humans and inoculating wild bats with aerosolised engineered spike proteins from viruses. Experts said if the ultimate aim of the proposal was to create a pan-coronavirus vaccine, constructing an “ideal” average virus would have been a good starting point. Daszak, currently a member of the [72]WHO team investigating the pandemic's origins, was also behind a letter published in The Lancet which [73]dismissed suggestions that Covid did not have a natural origin as a conspiracy theory. The WHO source said he had [74]struggled to raise the issue of a lab leak with other scientists and had been warned not to go on the record with his concerns. The proposal team has been approached for comment but had not responded at the time of publication. 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