People watch a TV showing a file image of North Korean leader Kim Jong Un during a news program at the Seoul Railway Station in Seoul, South Korea, Monday, March 9, 2020. North Korea fired three unidentified projectiles off its east coast on Monday, South Korea's military said, two days after the North threatened to take “momentous” action to protest outside condemnation over its earlier live-fire exercises. (Photo by Ahn Young-joon/AP Photo)





A woman wearing a face mask sweeps on the street in the morning in Seoul, South Korea, Wednesday, March 18, 2020. For most people, the new coronavirus causes only mild or moderate symptoms. For some it can cause more severe illness. (Photo by Lee Jin-man/AP Photo)





A couple wearing face masks rides a bicycle at a park in Seoul, South Korea, Saturday, March 7, 2020. The number of infections of the COVID-19 disease spread around the globe. (Photo by Ahn Young-joon/AP Photo)





A woman wearing a mask to prevent contracting the coronavirus stretches as she takes a walk at a Han river park in Seoul, South Korea, March 5, 2020. (Photo by Kim Hong-Ji/Reuters)





People wearing face masks to prevent the spread of a new coronavirus in Seoul, South Korea, Monday, March 2, 2020. South Korea has the world's second-highest cases. (Photo by Lee Jin-man/AP Photo)





A couple wearing masks to prevent contacting the coronavirus rides on an escalator at a subway station in Seoul, South Korea, March 1, 2020. (Photo by Kim Hong-Ji/Reuters)





A medical staff member in protective gear uses a swab to take samples from a visitor at 'drive-thru' testing center for the novel coronavirus disease of COVID-19 in Yeungnam University Medical Center in Daegu, South Korea, March 3, 2020. (Photo by Kim Kyung-Hoon/Reuters)





A delivery man for Coupang Jung Im-hong wearing a mask to prevent contracting the coronavirus, warms up before leaving to deliver packages in Incheon, South Korea, March 3, 2020. Picture taken on March 3, 2020. (Photo by Kim Hong-Ji/Reuters)





A man wearing a mask as a preventive measure against the coronavirus rides on a train in Seoul, South Korea, March 5, 2020. (Photo by Kim Hong-Ji/Reuters)





Government official wearing face masks make a phone call to the members of Shincheonji Church of Jesus to check if they have symptoms of suspected COBID-19 illness or not, at Goyang City Hall in Goyang, South Korea, Tuesday, March 3, 2020. The coronavirus spread to ever more countries and world capitals. (Photo by Ahn Young-joon/AP Photo)





South Korean army trucks spray disinfectant as a precaution against the coronavirus on a street in Ulsan, South Korea, Tuesday, March 3, 2020. China's coronavirus caseload continued to wane Tuesday even as the epidemic took a firmer hold beyond Asia. (Photo by Kim Young-tae/Yonhap via AP Photo)





South Korean army trucks spray disinfectant as a precaution against the new coronavirus on a road in Seoul, South Korea, Wednesday, March 4, 2020. (Photo by Ahn Young-joon/AP Photo)





South Korean army soldiers wearing protective gears spray disinfectant as a precaution against the new coronavirus at a shopping street in Seoul, South Korea, Wednesday, March 4, 2020. The coronavirus epidemic shifted increasingly westward toward the Middle East, Europe and the United States on Tuesday, with governments taking emergency steps to ease shortages of masks and other supplies for front-line doctors and nurses. (Photo by Ahn Young-joon/AP Photo)





A man wearing a face mask waits for the bus at a stop in Goyang, South Korea, Sunday, March 8, 2020. The number of infections of the COVID-19 disease spread around the globe. (Photo by Ahn Young-joon/AP Photo)





A man wearing a face mask walks in the rain on a street in Seoul, South Korea, Tuesday, March 10, 2020. For most people, the new coronavirus causes only mild or moderate symptoms, such as fever and cough. For some, especially older adults and people with existing health problems, it can cause more severe illness, including pneumonia. (Photo by Ahn Young-joon/AP Photo)





A Gimpo Airport official wearing a face mask passes by check-in counters of Japan Airlines at Gimpo Airport in Seoul, South Korea, Monday, March 9, 2020. South Korea announced on Friday, March 6, it will end visa-free entry for Japanese citizens starting Monday in retaliation for a two-week quarantine imposed by Japan on all visitors from South Korea because of its surging viral outbreak. (Photo by Ahn Young-joon/AP Photo)





Officials wearing traditional guard uniforms and protective face masks walk at the Gyeongbok Palace, the main royal palace during the Joseon Dynasty and one of South Korea's well known landmarks in Seoul, South Korea, Saturday, February 29, 2020. The coronavirus outbreak's impact on the world economy grew more alarming on Saturday, even as President Donald Trump denounced criticisms of his response to the threat as a “hoax” cooked up by his political enemies. (Photo by Lee Jin-man/AP Photo)





South Korean soldiers spray disinfectant in the street as a precaution against the spread of the novel coronavirus, in Seoul, South Korea, 04 March 2020. With over 5,000 cases of coronavirus reported, South Korea currently accounts for the largest number of infections outside mainland China. (Photo by Jeon Heon-Kyun/EPA/EFE)





A worker wearing a face mask watches his smart phone under lanterns in preparation for the upcoming birthday of Buddha on April 30 at the Chogyesa temple in Seoul, South Korea, Sunday, March 8, 2020. The number of infections of the COVID-19 disease continues to spread around the globe. (Photo by Ahn Young-joon/AP Photo)





Medical staff members arrive for a duty shift at Dongsan Hospital in Daegu, South Korea, Wednesday, March 18, 2020. For most people, the new coronavirus causes only mild or moderate symptoms, such as fever and cough. For some, especially older adults and people with existing health problems, it can cause more severe illness, including pneumonia. (Photo by Lee Moo-ryul/Newsis via AP Photo)