Researchers from Australia, Britain and the US sought clues about the disease's past and found it might have jumped from animal to humans long before the first detection in the central China city of Wuhan. In fact, these scientists have speculated that it could have been as long as a decade. [...]
It was conducted by Kristian Andersen from the Scripps Research Institute in California, Andrew Rambaut from the University of Edinburgh in Scotland, Ian Lipkin from Columbia University in New York, Edward Holmes from the University of Sydney, and Robert Garry from Tulane University in New Orleans.
Dr Francis Collins, director of the US National Institute of Health, said the study suggested that coronavirus had crossed from animals to humans long before it became capable of causing disease in people.
"Then, as a result of gradual evolutionary changes over years or perhaps decades. The virus eventually gained the ability to spread from human to human and cause serious, often life-threatening disease," he said in an article published on the institute's website on Thursday.
