no reports indicated any specific incidents arising. Infectious diseases Because of heavy congestion, shared accommodation, air pollution, compromised hygiene and heat, the transmission of infectious diseases is high. Due to population growth, economic growth and advancement in transport attendance between 2000 and 2010 increased by 46%. Global travel directly amplifies the risk of disease transmission. Vaccinations All visitors from both yellow fever and/or polio-affected countries must present valid certificates and/or vaccination evidence upon entry to Saudi Arabia. All visitors must have proof of vaccination against meningitis. The Saudi Arabia Ministry of Health recommends travellers to have the influenza, pertussis and measles vaccinations. Non-communicable diseases 50% of pilgrims suffer with diabetes. 64% of admissions into intensive care are for cardiovascular diseases. 46–66% of deaths during the Hajj are from cardiovascular diseases. See also Incidents during the Hajj References 2006 in Saudi Arabia 21st century in Mecca Disasters in religious buildings and structures Incidents during the Hajj Human stampedes in 2006 Human stampedes in Saudi Arabia 2006 disasters in Saudi Arabia