Christian faithful wearing masks to prevent contacting coronavirus pray during a service in Seoul, South Korea, February 23, 2020. Churches in South Korea were on high alert on Sunday with less followers attended Sunday services as newly reported cases were linked to some of the churches in the country. REUTERS/Kim Hong-Ji

Christian faithful wearing masks to prevent contacting coronavirus pray during a service in Seoul, South Korea, February 23, 2020. The Korea Centers for Disease and Control and Prevention (KCDC) on Sunday reported 161 new confirmed coronavirus cases and a fourth death from the virus, taking total infections to 763. REUTERS/Kim Hong-Ji

A christian faithful wearing a mask to prevent contacting coronavirus prays during a service in Seoul, South Korea, February 23, 2020. More than half the additional cases were found to be linked to a Shincheonji Church of Jesus congregation in the southeastern city of Daegu after a 61-year-old woman known as "Patient 31" who attended services at the church tested positive for the virus last week. The woman had no recent record of overseas travel. REUTERS/Kim Hong-Ji

Christian faithful wearing masks to prevent contacting coronavirus pray during a service in Seoul, South Korea, February 23, 2020. Catholic churches in the cities of Daegu and Gwangju have suspended mass and other gatherings while churches in elsewhere saw lesser people attending church services on Sunday. REUTERS/Kim Hong-Ji

Christian faithful wearing masks to prevent contacting coronavirus pray during a service in Seoul, South Korea, February 23, 2020. The country's capital Seoul has shut down branches of the Shincheonji Church and other churches are banning entry of the Shincheonji followers. REUTERS/Kim Hong-Ji

Christian faithful wearing masks to prevent contacting coronavirus pray during a service in Seoul, South Korea, February 23, 2020. South Korea's earlier cases were linked to China but the new infections center on Daegu, a city of about 2.5 million, and a hospital in Cheongdo, a county with about 43,000 people. In response to the recent sharp rise in cases, KCDC designated both the city of Daegu and Cheongdo county as "special care zones" on Friday, February 21. REUTERS/Kim Hong-Ji