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An international expert mission to Wuhan has concluded that it was very likely that Covid-19 first transferred to humans from a bat through an intermediary animal, while all but ruling out a laboratory leak.
According to the much anticipated report — a copy of it was obtained by AFP on Monday before it was officially released — the intermediate host hypothesis was deemed “likely to very likely”, while the theory that the virus escaped from a lab was seen as “extremely unlikely”
Ever since the expert team left China more than a month ago, the report from the international mission to Wuhan has been keenly anticipated.
Delays in the publication of the findings, drafted in collaboration with the team’s Chinese counterparts, had been blamed on coordination and translation issues, even as a diplomatic tug-of-war raged in the background over the contents of the report.
The experts and their Chinese counterparts made it clear during a lengthy press conference in Wuhan on February 9 at the end of the mission, that they could not yet draw any firm conclusions.
But they said they had worked to rank a number of hypotheses according to how likely they were.
– ‘Missing link’ –
Experts believe that the SARS-CoV-2 virus that causes the Covid-19 disease originally came from bats.
One theory that was looked at was that the virus jumped directly from bats to humans. The final report determined that this scenario was “possible to likely”.
The report also found that a more likely scenario was that the virus had first jumped from bats to another animal, which in turn infected humans.
“Although the closest related viruses have been found in bats, the evolutionary distance between these bat viruses and SARS-CoV-2 is estimated to be several decades, suggesting a missing link,” the report said.
“The scenario including introduction through an intermediary host was considered to be likely to very likely,” it said, although it did not conclude which animal may have first allowed the virus to jump to humans.
However, the report did not rule out transmission through frozen food — Beijing’s favoured theory — since the virus appears to be able survive at freezing temperatures, saying that “introduction via cold/ food chain products is considered possible”.
The report finally examined the idea of a lab leak from, for instance, the Wuhan Institute of Virology — a theory promoted by former US president Donald Trump’s administration.
It pointed to the fact that there was no record of any virus resembling SARS-CoV-2 in any laboratory before December 2019, and stressed high safety levels at the labs in Wuhan.
“A laboratory origin of the pandemic was considered to be extremely unlikely,” it said.
Japan’s Naomi Osaka advanced into the fourth round of the WTA and ATP Miami Open by walkover on Sunday after Serbian Nina Stojanovic withdrew due to a right thigh injury. […]
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