An Indian worker wears a mouth and nose mask as he touches a camel at his Saudi employer's farm on May 12, 2014 outside Riyadh. Saudi Arabia has urged its citizens and foreign workers to wear masks and gloves when dealing with camels to avoid spreading the Middle East Respiratory Syndrome (MERS) coronavirus as health experts said the animal was the likely source of the disease.  AFP PHOTO/FAYEZ NURELDINE        (Photo credit should read FAYEZ NURELDINE/AFP/Getty Images)