The case highlights a key difficulty for reopening countries.
China reported its first new case of coronavirus in Wuhan on Sunday, marking the first new case since April 3 and joining a spate of new cases across China and other countries that had seen progress in getting the disease under control and reopening, including South Korea and Germany.
“We must never lower our guard regarding epidemic prevention,” South Korean President Moon Jae-in said in a televised address. “We are in a prolonged war. I ask everyone to comply with safety precautions and rules until the situation is over, even after resuming daily lives.
