GENEVA – The World Health Organisation (WHO) on Friday urged all countries to reveal what they know about the origins of Covid-19, following US claims of a Chinese lab leak and furious denials from Beijing.

Federal Bureau of Investigation director Christopher Wray told Fox News television on Tuesday that the United States security agency had now assessed that the source of the Covid-19 pandemic was “most likely a potential lab incident in Wuhan”.

The first infections were recorded in the Chinese city in late 2019.

Chinese officials have angrily denied the claim, calling it a smear campaign against Beijing.

“If any country has information about the origins of the pandemic, it’s essential for that information to be shared with the WHO and the international scientific community,” WHO director-general Tedros Adhanom Ghebreyesus insisted.

“Not so as to apportion blame, but to advance our understanding of how this pandemic started so we can prevent, prepare for and respond to future epidemics and pandemics,” he told a press conference.

“WHO has not abandoned any plans to identify the origins of the Covid-19 pandemic,” he stressed.

In 2021, the United Nations’ health agency set up the Scientific Advisory Group for the Origins of Novel Pathogens to look into the origins of the pandemic.

WHO urges transparency

“WHO continues to call for China to be transparent in sharing data and to conduct the necessary investigations and share the results,” said Dr Tedros, adding that he had written and spoken to top Chinese leaders on multiple occasions.

“Until then, all hypotheses on the origins of the virus remain on the table,” he said.

But he added that politicisation of the origins research was making the scientific work harder – and the world less safe as a result.

The comments from Mr Wray came after a report earlier this week said the US Department of Energy had determined that a Chinese lab leak was the most likely cause of the Covid-19 outbreak. The department works with a network of national laboratories, including some involved in advanced biological research.

Other agencies within the US intelligence community believe the virus emerged naturally.

Dr Maria Van Kerkhove, Covid-19 technical lead at the WHO, said the organisation had reached out to the US mission in Geneva for more information.

So far, however, access to the data on which the US reports were based has not been given, said Dr Van Kerkhove, who is an infectious disease epidemiologist.

“It remains vital that that information is shared”, to help move the scientific studies forward, she added.

Dr Tedros said there was a moral imperative to find out how the pandemic started, for the sake of the millions who lost their lives to Covid-19 and those living with long Covid.

More than 6.8 million Covid-19 deaths and more than 758 million confirmed cases have been reported to the WHO, which acknowledges that the true toll is far higher. AFP