Chinese tourist wearing a mask to prevent contracting Middle East Respiratory Syndrome (MERS) takes a selfie in front of the main entrance of the Gyeongbok Palace in central Seoul, South Korea on June 4, 2015.

Chinese tourist wearing a mask to prevent contracting Middle East Respiratory Syndrome (MERS) takes a selfie in front of the main entrance of the Gyeongbok Palace in central Seoul, South Korea on June 4, 2015.

Credit:

Kim Hong-Ji/Reuters 

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