Volume 18-Issue 4-2011 Change in carriage rate of Meningococcal meningitis among Hajjis from low and high endemic countries Health Related Experiences among International Pilgrims Departing Through King Abdul Aziz International Airport, Jeddah, Saudi Arabia, Hajj 1431 H (2010). Pattern of diseases and preventive measures among domestic Hajjis from Riyadh, 1431H