Ahn Young-joon/AP Photo
  • Workers wearing protective gears spray antiseptic solution as a precaution against the spread of MER virus outside Wangsimni Subway Station in Seoul, South Korea, June 11, 2015.
    Ahn Young-joon/AP Photo
  • A health care worker wearing protective gear as a precaution against the MERS virus tends a MERS patient inside an isolation ward at Seoul Medical Center in Seoul, South Korea, June 10, 2015.
    Yun Dong-jin/Yonhap via AP Photo
  • Face masks are displayed for sale on a street in Seoul on June 10, 2015. South Korean President Park Geun-Hye has postponed a planned trip to the US, her spokesman said, amid growing public alarm over the MERS outbreak.
    Ed Jones/AFP/Getty Images
  • A woman wearing a face mask walks past a lips sign advertising a sale in a shopping district in Seoul, June 11, 2015.
    Jung Yeon-Je/AFP/Getty Images
  • A couple wearing face masks walk on a street in the popular student area of Hongdae in Seoul, South Korea on June 7, 2015.
    Ed Jones/AFP/Getty Images
  • Passengers wearing masks to prevent contracting Middle East Respiratory Syndrome (MERS) sit inside a train in Seoul, South Korea, on June 5, 2015.
    Kim Hong-Ji/Reuters
  • Disinfection workers wearing protective gear spray anti-septic solution in a subway amid rising public concerns over the spread of MERS virus in Goyang, South Korea on June 9, 2015.
    Chung Sung-Jun/Getty Images
  • South Korean soldiers wear face masks as they march after a ceremony marking the 60th anniversary of Korean Memorial Day at the National Cemetery in Seoul, South Korea on June 6, 2015.
    Jung Yeon-Je/AFP/Getty Images
  • A thermal camera monitor shows the body temperature of visitors at a business complex on June 9, 2015 in Seoul, South Korea.
    Chung Sung-Jun/Getty Images
  • A man wearing a face mask checks his reflection on a building in an alleyway in Seoul, South Korea on June 9, 2015.
    Ed Jones/AFP/Getty Images
  • South Korean soldiers check the body heat of visitors at the entrance of the Defense Ministry in Seoul, South Korea on June 9, 2015.
    Jung Yeon-Je/AFP/Getty Images
  • South Korean elementary school students wear masks as a precaution against the MERS virus as they attend a lesson at an elementary school in Busan, South Korea on June 9, 2015.
    Cha Geun-ho/Yonhap/AP Photo
  • A Chinese tourist wearing a mask to prevent contracting MERS takes a selfie in front of the main entrance of the Gyeongbok Palace in Seoul, South Korea, on June 4, 2015.
    Kim Hong-Ji/Reuters
  • A couple wearing face masks walk on a street in Seoul, South Korea on June 9, 2015.
    Ed Jones/AFP/Getty Images
  • A mother and son from Singapore wear masks as a precaution against the MERS virus at the Incheon International Airport on June 6, 2015 in Incheon, South Korea.
    Chung Sung-Jun/Getty Images
  • Members of South Korea's Center for Disease Control and Prevention fill out paperwork at the MERS patient quarantine at National Seoul University hospital in Seoul, South Korea on June 1, 2015.
    Lee Young Ho/AP Photo
  • Tourists wearing face masks visit Gyeongbokgung Palace in Seoul, South Korea on June 5, 2015.
    Ed Jones/AFP/Getty Images