Since COVID-19 first took off, political leaders, infectious disease specialists, and the lay public have debated its origins. Eventually, two hypotheses emerged: Either the virus crossed over from animals to humans in a wet market in Wuhan—the city in which the disease first appeared—or it leaked from a Chinese lab,

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 CIA now believes the virus responsible for the COVID-19 pandemic most likely originated from a laboratory.