COVID-19: The endless search for the origins of the virus | Coronavirus pandemic News

Even as COVID-19 enters its third year as a pandemic, the world is no closer to knowing the source of the virus that sparked it all.

Just six weeks after declaring a global health emergency, the World Health Organization (WHO) declared the spread of the new coronavirus a pandemic on March 11, 2020.

But while the animal hosts of the coronaviruses that caused the 2003-2004 SARS and 2012 MERS outbreaks were identified in a matter of months, the origin of the current SARS-CoV-2 virus – along with its myriad mutations and variants – has proved more elusive.

Last September, a task force set up by The Lancet COVID-19 Commission to search for the pandemic’s ultimate source was disbanded after 14 months, amid rancour, recriminations and concerns about conflicts of interest. And the probe by the WHO, a public health agency with no investigatory powers, has largely been stalled after a tightly controlled fact-finding trip to China in January 2021.

China has yet to provide the WHO with the evidence to support Beijing’s assertion that the spread of coronavirus had a natural zoonotic pathway – moving from bats to an animal host to humans – and the Huanan Seafood Market where the first cases were traced was swiftly disinfected and closed.

The struggle to find the source has helped give more credence to the possibility that the virus might have come from elsewhere, including a laboratory leak. Whatever the case, the evidence remains within China.

“I became convinced that China isn’t being transparent; they’re being evasive about quite a few things,” said Colin Butler, an honorary professor with the National Centre for Epidemiology and Population Health at Australian National University in Canberra.

Late last year, Butler was commissioned by the United Nations Environment Programme to write a report entitled Environmental Change and COVID-19: The Risk of Future Pandemics in Asia and the Pacific. In the study, Butler listed medical and laboratory procedures as risk factors that could allow viruses to escape from a controlled setting and spread widely. For example, China allows experiments on coronaviruses to be conducted in low-biosecurity settings that only mandate protective gear for lab workers, a sink and an eyewash station.

Mindful that the origin of a 1979 anthrax outbreak in the former Soviet Union that killed at least 66 people was only revealed after the country’s collapse in 1992, Butler says he believes the truth about the current pandemic will remain buried by the current Chinese leadership.

“China isn’t going to be open about this under the current regime,” he said.

‘Taking a side’

In the first months of the pandemic, in April 2020, Australia was one of the first countries to call for an independent investigation into the origins of COVID-19. But other countries, most notably the United States, have not echoed Canberra’s call.

“I’m absolutely convinced that a lot of people are being not sufficiently transparent – not just in China but also in the US,” Butler added.

In the US, molecular biologist Alina Chan shares Butler’s suspicions.

Chan, a scientific adviser at the Broad Institute of MIT and Harvard, was among the first scientists who advocated against dismissing a lab leak as the source of the virus.

Last November, together with British science writer Matt Ridley, Chan co-authored Viral: The Search for The Origin of COVID-19 and expounded on the evidence for the two most likely origin stories for the virus: via an animal carrier in nature or a lab accident.

In a poll last summer, a majority of Americans, regardless of political persuasion, said they believed the virus had come from a lab leak in China. Even so, Chan says the push for an investigation has been stymied by partisan politics in Washington.

“Everyone is taking a side and trying to take down the other side,” Chan told Al Jazeera. “It isn’t fantastical to say there’s a cover-up.”

For Chan and all those who argue that the SARS-CoV-2 virus could have originated from a lab, so long as an intermediary animal host that had passed the virus from bats to humans cannot be located, the natural-origin scenario lacks the scientific support it needs.

Also, the widely shared observation that right from the start the virus has unique features that made it extremely adapted to infecting humans en masse continues to baffle even specialists on coronaviruses.

“Dispositive evidence for a natural origin of SARS1 and MERS had been quickly found despite less advanced technologies at the time. Yet, for SARS2, we still cannot find any…