Wuhan, the Chinese city where the coronavirus pandemic began, has announced an ambitious plan to test all of its 11 million residents for the virus in the coming days, a campaign that will be closely watched by governments elsewhere. The testing drive, which is likely to require the mobilization of thousands of medical and other workers, shows the ruling Communist Party’s resolve to prevent a second wave of infections as it tries to restart China’s economy. The plan was announced this week after Wuhan reported six coronavirus cases, breaking a streak of more than a month without any new confirmed infections. The city’s goal of testing every resident is unrivaled in scale, and in the speed at which Wuhan apparently plans to carry it out. Some countries, like South Korea and Germany, have aggressively tested and traced infections, albeit at much lower levels than Wuhan is attempting. […]