In this photo taken Tuesday, May 13, 2014, Muslim pilgrims wear surgical masks to prevent infection from respiratory virus known as the Middle East respiratory syndrome (MERS) in the holy city of Mecca, Saudi Arabia. Officials in Saudi Arabia are raising alarm that the kingdom is not doing enough to prevent Mecca from becoming a route for exporting an often deadly respiratory virus as millions of Muslims from around the world converge on the city to perform pilgrimage at Islam’s holiest site. (AP Photo/Hasan Jamali)
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