A Muslim pilgrim wears a surgical mask to help prevent infection from a respiratory virus known as the Middle East Respiratory Syndrome (MERS) in the holy city of Mecca, Saudi Arabia, on May, 13, 2014. (AP Photo/Hasan Jamali)
A Muslim pilgrim wears a surgical mask to help prevent infection from a respiratory virus known as the Middle East Respiratory Syndrome (MERS) in the holy city of Mecca, Saudi Arabia, on May, 13, 2014. (AP Photo/Hasan Jamali)