1 / 11British Professor Angus Dalgleish and Norwegian scientist Dr. Birger Sørensen are about to publish their research which claims to have found ‘unique fingerprints’ in virus samples which point to manipulation in a laboratory.2 / 11The paper says scientists inside the lab were altering naturally-occurring viruses to make them more infectious in order to study their potential effects on humans.3 / 11They say Covid-19 was created by splicing a natural coronavirus ‘backbone’ found in Chinese cave bats onto it a new ‘spike’ and it escaped via lower-security areas of the institute.4 / 11Scientists then tried to cover their tracks by reverse-engineering versions of the virus to make it look like it had evolved from bats, the research claims. The study, seen by the Daily Mail, was spurned by mainstream journals and academics but is now set to be published in the Quarterly Review of Biophysics Discovery.5 / 11It marks the latest sign that the theory that Covid 19 was made in a lab – until now dismissed as outlandish by politicians and scientists alike.6 / 11The United States and Britain are stepping up calls for the World Health Organisation to take a deeper look into the possible origins of the virus, including a new visit to China.7 / 11US president Joe Biden on Wednesday ordered aides to find answers, saying U.S. intelligence agencies were pursuing rival theories, potentially including the possibility of a laboratory accident in China.8 / 11China has always denied the claims and has dismissed suggestions the origins of the virus should be re-investigated.9 / 11Prof Dalgleish who works at St George’s University, London, and Dr Sørensen, the chair of pharmaceutical company, Immunor, claim Covid-19 has ‘no credible natural ancestor’.10 / 11They say that it is ‘beyond reasonable doubt’ that the virus was created through ‘laboratory manipulation’. 11 / 11The pair were studying samples of the virus while working on a Covid vaccine when they say they discovered evidence that points to human interference.