China must co-operate better in the probe into the origins of the coronavirus pandemic, the first cases of which were seen in Wuhan in December 2019, the head of the World Health Organization said on Thursday.
"We hope there will be better co-operation to get to the bottom of what happened," Tedros Adhanom Ghebreyesus told a regular press briefing in Geneva, calling in particular for access to raw data which so far has been inadequate.