Amid all the blame, counter-accusations, suspicions and cover-ups, one problem remains for us humans as a species. We really need to know how and why this virus came to be, so we can stop it from happening again, writes Nick Paton Walsh
Why does the theory that SARS-CoV-2, the virus that causes Covid-19, leaked from a laboratory in China endure so persistently?
Above all, it isn't because public, hard, tested evidence is growing at pace.The theory instead seems to persist mostly because of several massive coincidences. Firstly, Wuhan, where the disease almost certainly began in China, is home to China's major biosafety level 4 laboratory, the Wuhan Institute of Virology . It, and two other laboratories in Wuhan, were doing research on coronaviruses, some of it in bats.