Tourists wearing masks to prevent contracting Middle East Respiratory Syndrome (MERS), walk at Myeongdong shopping district in central Seoul, South Korea June 3, 2015. South Korea confirmed five more cases of the Middle East Respiratory Syndrome (MERS) virus, the health ministry said early on Wednesday, bringing to 30 the total number of cases in the country of the often-deadly illness. REUTERS/Kim Hong-Ji