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The World Health Organisation said on Monday that an advance team looking into the origins of the Covid-19 outbreak has concluded its mission in China, and the UN health agency is preparing the deployment of a larger group of experts to the suspected outbreak zone.
WHO Director-General Tedros Adhanom Ghebreyesus said the international team will deploy to Wuhan, the city where the pandemic is believed to have erupted late last year. Tedros said the terms of reference have been drawn up by the WHO and China, but he did not specify.
“The WHO advance team that travelled to China has now concluded its mission to lay the groundwork for further joint efforts to identify the virus’ origins,” he told a news conference.
“Epidemiological studies will begin in Wuhan to identify the potential source of infection of the early cases.”
He said evidence and hypothesis generated from the work would lay the ground for further, longer-term studies.
The unknown unknowns
The comments came amid an increasingly heavy toll from the pandemic in the United States, Brazil and India, as investigators seek to clarify the origins of the virus and how it may have jumped from animals to humans late last year.
Dr Michael Ryan, the WHO’s emergencies chief, noted gaps in the epidemiological landscape and said it would be assessed what studies to conduct and what data to collect. He said the two-person advance team had not returned from China, and had not been debriefed yet.
“The real trick is to go to the human clusters that occurred first and then to work your way back systematically looking for that first signal at which the animal human species barrier was crossed,” Ryan said.
The WHO press office, contacted after the news conference, did not provide details of the terms of reference, or say whether they would be made public, or indicate how big the international team would be or when it could be sent to China.
It said team members had extensive discussions with their Chinese counterparts during the three-week visit, and had discussions by video with virologists and other scientists in Wuhan — including the Wuhan Institute of Virology.
Trump’s explosive claim
US President Donald Trump in April claimed to have seen evidence to support the theory that the lab was the origin of the virus.
On Sunday, Dr Deborah Birx, the White House top coronavirus adviser, said the virus was extraordinarily widespread in the US and infections in urban and rural America marked a new phase for the pandemic in the country.
Ryan, asked to comment about such remarks, said he didn’t believe the intention was to create a sense of a new phase, but to really remind all states that the disease never went away.
“It’s not our job to tell the US what it should be doing at a sub-national level: The state-based planning and implementation guided by the national scientists seems to be (on) the right path,” Ryan added. “The difficulty for us all is: sometimes we know the right path. The difficulty is choosing to walk it.”
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