Medical staff transport patients of a sanatorium where mass coronavirus infections occurred to hospital in Daegu, South Korea, March 19, 2020. South Korea reported 152 more cases of the COVID-19 compared to 24 hours ago as of midnight Thursday local time. Seven more deaths were confirmed and 407 more patients were discharged from hospital. (Photo by Lee Sang-ho/Xinhua)

Medical staff transport patients of a sanatorium where mass coronavirus infections occurred to hospital in Daegu, South Korea, March 19, 2020. South Korea reported 152 more cases of the COVID-19 compared to 24 hours ago as of midnight Thursday local time. Seven more deaths were confirmed and 407 more patients were discharged from hospital. (Photo by Lee Sang-ho/Xinhua)

Police officers maintain order at the gate of a sanatorium where mass coronavirus infections occurred in Daegu, South Korea, March 19, 2020. South Korea reported 152 more cases of the COVID-19 compared to 24 hours ago as of midnight Thursday local time. Seven more deaths were confirmed and 407 more patients were discharged from hospital. (Photo by Lee Sang-ho/Xinhua)

Medical staff transport patients of a sanatorium where mass coronavirus infections occurred to hospital in Daegu, South Korea, March 19, 2020. South Korea reported 152 more cases of the COVID-19 compared to 24 hours ago as of midnight Thursday local time. Seven more deaths were confirmed and 407 more patients were discharged from hospital. (Photo by Lee Sang-ho/Xinhua)

Medical staff transport patients of a sanatorium where mass coronavirus infections occurred to hospital in Daegu, South Korea, March 19, 2020. South Korea reported 152 more cases of the COVID-19 compared to 24 hours ago as of midnight Thursday local time. Seven more deaths were confirmed and 407 more patients were discharged from hospital. (Photo by Lee Sang-ho/Xinhua)