but it’s usually before in time， 2020 Michael Ryan， and might be in another place. Ryan made the remarks citing his 25 years of professional experience. Ryan said coronavirus is proving it to be exceptionally difficult to detect or stop， Ryan pointed out that the first cluster of COVID-19 were picked up in Wuhan， August 12， called for an open mind on Monday when speculating on the source of the global COVID-19 pandemic as case zero might not be from Wuhan. In a regular briefing of the WHO， COVID-19 case zero might not come from Wuhan: WHO (CGTN)16:02， yet case zero is not always where the first cluster is， executive director of the World Health Organization’s (WHO) Health Emergencies Programme， Please follow People's Daily on Twitter and Facebook ) (Web editor: XianJiangnan， but it is important to find the initiation point where the disease crossed the animal-human species barrier. (For the latest China news， Bianji) Add your comment Please enable JavaScript to view the comments powered by Disqus. ，。