2020 US report claims Covid virus leaked from Wuhan lab

A Wall Street Journal 2020 report has claimed that the novel coronavirus leaked from a Wuhan-based lab in China. Earlier, Beijing had accused the US of "spreading conspiracy theories" after US President Joe Biden asked officials to 'redouble' their efforts to probe the origin of the Covid-19 pandemic. This came amid growing calls for a full scale probe of whether the coronavirus may have escaped from China’s bio lab. For more, watch the full video.