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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)