The Wuhan lab-leak theory is back in the limelight, and US President Biden has ordered an investigation into the origins of Covid-19. Biden says the US Intelligence Community has “coalesced around two likely scenarios” but has not reached a definitive conclusion on the origin of the virus.

Professor Michael Imperiale, a virologist at the University of Michigan, says that while he believes the data still points toward a natural origin, the scientific community needs to rethink some basic research safety practices in light of the coronavirus pandemic.