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.