As a fifth death is announced, South Korea’s president authorizes bold measures. President Moon Jae-in on Sunday put South Korea on the highest possible alert in its fight against the coronavirus, a move that empowers the government to lock down cities and take other sweeping measures to contain the outbreak. “The coming few days will be a critical time for us,” Mr. Moon said at an emergency meeting of government officials to discuss the outbreak, which in just days has spiraled to 602 confirmed infections and five deaths. “This will be a momentous time when the central government, local governments, health officials and medical personnel and the entire people must wage an all-out, concerted response to the problem.” Mr. Moon did not announce any specific measures to fight the virus. But by raising the alert to Level 4, or “serious,” he authorized the government to take steps like banning […]