The world has been battling the Covid-19 pandemic for a year and a half, but we still don't know where it all started. Even as a probe team sent by the World Health Organisation to China tried to undermine the possibility that the Sars-CoV-2 coronavirus leaked from a lab in Wuhan, top scientists from leading universities like Harvard, Cambridge, and MIT have questioned the conclusion. This comes on the heels of a news report citing documents that claimed that China discussed the weaponisation of coronaviruses a few years ago. So did Covid come from natural sources, or was it created in a lab? Watch the full video for more.