A team of global experts probing the origins of Covid-19 in Wuhan have not ruled out the possibility that it escaped from a lab.
Investigators working on behalf of the World Health Organisation wrapped up a visit to a major virus research laboratory in the Chinese city which was ground zero for the coronavirus outbreak a year ago.
The team spent almost four hours at the heavily-guarded Wuhan Institute of Virology in their quest to find out how the first human became infected with the disease which has now killed 2.2 million people worldwide.
British scientist Dr Peter Daszak, who is part of the investigation, said on Wednesday the team is receiving data "which no one has seen before" and are "really getting somewhere".
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