Mers MERS attacks Korea.

Recently, Korea is confused because of Mers MERS. I am worry worried about infection from me to my family. Cuz because I work in a Hospital. So, I try to wash my hands as soon as I leave at the hospital and wear a mask when I take the subway. I wish Mers MERS would go away faster!!!!!

You wrote it well and you were able to communicate your thoughts effectively. I was just a little picky about your grammar. Another point to make, is that MERS is an acronym meaning that it is composed of letters that stand for words and must therefore be written completely in capitals in order to make the distinction from a word itself. Middle East respiratory syndrome when abbreviated with its anocronym should show as MERS

You did write your English well though, good job!