All but one scientist who penned a letter in The Lancet dismissing the possibility that coronavirus could have come from a lab in Wuhan were linked to its Chinese researchers, their colleagues or funders, a Telegraph investigation can reveal. The influential journal published a letter on March 7 last year from 27 scientists in which they stated that they "strongly condemned conspiracy theories" surrounding Covid-19. It effectively shut down scientific debate into whether coronavirus was manipulated or leaked from a lab in Wuhan. Researchers who tried to investigate a link but were stonewalled and branded conspiracy theorists called it an "extreme cover-up". Despite declaring no conflicts of interest at the time, it has since emerged that the letter was orchestrated by British zoologist Peter Daszak, president of the US-based EcoHealth Alliance, which funded research at the Wuhan Institute of Virology, where the leak was suspected. However, The Telegraph can disclose that 26 of the 27 scientists listed in the letter had connections to the Chinese lab, through researchers and funders closely linked to Wuhan. While Mr Daszak eventually declared his involvement in the EcoHealth Alliance, he failed to mention that five other signatories also worked for the organisation. A further three of the signatories were from Britain's Wellcome Trust, which has funded work at the Wuhan Institute of Virology in the past. Out of 27 signatories, only Prof Ronald Corley, of Boston University, appears to have no links to funders or researchers.