China has ended its lockdown of Wuhan, the original epicenter of the coronavirus crisis, as the city reemerges from a deadly outbreak that is now raging across the globe. But even as Wuhan reopens its borders after 76 days, some restrictions within the city will remain in place, and officials warn that the threat of further infections remains far from over. The metropolis of 11 million, where the coronavirus was first detected in December, had been sealed off from the outside world since January 23 in an unprecedented effort to contain the outbreak.