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Luisa Vieira

Lessons from the COVID lab-leak fiasco

The US Department of Energy made unlikely headlines over the weekend when The Wall Street Journal reported that new evidence had led the agency to conclude with “low confidence” that the COVID-19 virus probably escaped from a Chinese lab. The DOE’s findings match up with the FBI’s, which point to an accidental leak from the Wuhan Institute of Virology with “moderate confidence.”

This follows investigations by four other agencies plus the National Intelligence Council that concluded with low confidence that the virus spread naturally from animals to humans, possibly in a wet market in Wuhan. Other intelligence agencies, including the CIA, remain undecided, much like DOE was until recently.

The bottom line is we still don’t know how the pandemic got started. Both origin stories – natural transmission and laboratory leak – are scientifically plausible. The DOE’s report should lead us to update our beliefs slightly toward the lab-leak theory, but the score in the intelligence community is still 5-2 in favor of zoonotic transfer, and all but the FBI’s conclusions were reached with low confidence.

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