A study was published in Science and seems to put an end to the controversy about the origin of the pandemic
“Our findings provide evidence that the Wuhan market was the first epicenter of the Covid-19 pandemic and suggest that SarsCoV2 likely emerged from the wildlife trade in China.”
These are the results of an international study just published, that seems to put an end to the diatribe on the origin of the pandemic.
The study reconstructed the early stages of the pandemic, focusing on the distribution of the earliest known cases in humans, those in mammals sensitive to SarsCoV2 and linking them to positive samples taken from the environment, such as cages.
All the reconstructions led back to the Huanan Seafood Wholesale Market in Wuhan, although “the events upstream of the market, as well as the exact circumstances within the market, remain obscure,” the researchers point out.
A second study, has instead reconstructed the family tree of SarsCoV2 dating back to the first two lineages of the virus. The researchers’ backward genetic journey managed to conclude that the SarsCoV2 virus was probably first transferred from animal to man between 23 October and 8 December 2019 (probably around 19 November) and a second time in the following weeks.
“These results indicate that SarsCoV2 is unlikely to have circulated widely in humans before November 2019 and define the narrow window between when SarsCoV2 first moved to humans and when the first cases of Covid-19 were reported.” .