For three years, the U.S. government has been tied in knots over the origins of the coronavirus pandemic, frustrated that China’s hindrance of investigations and unwillingness to look critically at its own research have obscured what intelligence agencies can learn about whether the virus escaped from a lab.
Inquiries during the Trump and Biden administrations have yielded no definitive answers. The Energy Department and the F.B.I. favored the theory that a laboratory leak may have caused the pandemic. Five intelligence bodies considered theories of natural transmission — that the coronavirus developed naturally and was transferred to humans at an animal market or other location — more likely. But the C.I.A., the nation’s leading spy agency, would not make an assessment with even a low level of confidence.
This week, intelligence agencies are expected to release declassified material on what they have learned about Covid’s origins, a subject of intense interest and scrutiny among American lawyers. But people briefed on the material say there is no smoking gun, no body of evidence that sways the intelligence community as a whole, or top C.I.A. analysts, that a lab leak was the more likely origin of the pandemic than natural transmission, or vice versa.
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