Could Covid-19 have originated from a Chinese lab accident? When the virus was first identified, many pointed out that it was close to the Wuhan Institute of Virology. It sounded like a conspiracy theory. But it’s all too plausible. And there are questions that the long-awaited report by the World Health Organisation leaves unanswered. Only after the pandemic started did Professor Shi Zhengli, director of the Center for Emerging Infectious Diseases at the Wuhan Institute of Virology, notice that a close viral relative to Covid-19 had been found in a mineshaft years before. There was an apparent pneumonia outbreak nine years ago at a copper mine in Mojiang, around 1,000 miles from Wuhan, in an area where Zhengli’s team regularly hunted for new viruses.