Phoho taken on March 1, 2020 shows a market in Gwangju, South Korea. South Korea confirmed 376 more cases of the COVID-19 as of 9:00 a.m. local time Sunday, raising the total number of infections to 3,526. The death toll was unchanged at 17. (NEWSIS/Handout via Xinhua)

A staff member disinfects a church in Seoul, South Korea, March 1, 2020. South Korea confirmed 376 more cases of the COVID-19 as of 9:00 a.m. local time Sunday, raising the total number of infections to 3,526. The death toll was unchanged at 17. (NEWSIS/Handout via Xinhua)

Photo taken on March 1, 2020 shows a notice asking passengers from South Korea to the U.S. to undergo additional security checks, at Incheon International Airport, South Korea. South Korea confirmed 376 more cases of the COVID-19 as of 9:00 a.m. local time Sunday, raising the total number of infections to 3,526. The death toll was unchanged at 17. (NEWSIS/Handout via Xinhua)

People disinfect a market in Gwangju, South Korea, March 1, 2020. South Korea confirmed 376 more cases of the COVID-19 as of 9:00 a.m. local time Sunday, raising the total number of infections to 3,526. The death toll was unchanged at 17. (NEWSIS/Handout via Xinhua)

The Marine Police carry out disinfection and epidemic prevention work for police speedboats at the special wharf of Incheon Marine Police in Incheon, South Korea, March 1, 2020. South Korea confirmed 376 more cases of the COVID-19 as of 9:00 a.m. local time Sunday, raising the total number of infections to 3,526. The death toll was unchanged at 17. (NEWSIS/Handout via Xinhua)

Staff members disinfect a court in Suwon, South Korea, March 1, 2020. South Korea confirmed 376 more cases of the COVID-19 as of 9:00 a.m. local time Sunday, raising the total number of infections to 3,526. The death toll was unchanged at 17. (NEWSIS/Handout via Xinhua)