A newly declassified report, released by the CIA on Saturday, is once again stoking the debate around the origins of SARS-CoV-2, the virus behind COVID-19. The report is not based on any new intelligence and was completed under the agency’s previous leadership at the request of the Biden administration.

The problem for the lab-leak position is that the U.S. has never had access to the Wuhan lab and has thus been unable to reach a definitive answer for more than five years. Now that the CIA has at last come to a conclusion, not all scientists are sold on what it has reported, seeing the results as thinly scientifically sourced.

The CIA says both a natural origin and a lab leak "remain plausible" as potential sources of covid-19, following a review of the pandemic's origins.