SEOUL, SOUTH KOREA - JUNE 10:  A health care worker wears protective gear as she cares for a MERS patient at Seoul Medical Center where eight MERS patients are hospitalized on June 10, 2015 in Seoul, South Korea. South Korea has reported 9 deaths, over 2400 schools closed, and over 2800 people quarantined as of June 10, 2015.  (Photo by Chung Sung-Jun/Getty Images)