British professor Angus Dalgleish - best known for creating the world's first 'HIV vaccine', and Norwegian virologist Dr. Birger Sørensen - chair of pharmaceutical company, Immunor, who has published 31 peer-reviewed papers and holds several patents, wrote that while analyzing virus samples last year, the pair discovered "unique fingerprints" in the form of "six inserts" created through gain-of-function research at the Wuhan Institute of Virology in China.

They also conclude that "SARS-Coronavirus-2 has "no credible natural ancestor" and that it is "beyond reasonable doubt" that the virus was created via "laboratory manipulation."

Last year, Sørensen told Norwegian broadcaster NRK that COVID-19 has properties which have 'never been detected in nature,' and that the United States has 'collaborated for many years on coronavirus research through "gain of function" studies with China.

The paper detailing their months-long "forensic analysis," which looked back at experiments done at the Wuhan Institute of Virology between 2002 and 2019, is set to be published in the scientific journal Quarterly Review of Biophysics Discovery.