title: Health conditions for travellers to Saudi Arabia for the pilgrimage to Mecca (Hajj).
mesh_terms: D018562:Disease Transmission, Infectious / Q000517:prevention & control*; D006801:Humans; D007251:Influenza, Human / Q000635:transmission; D008585:Meningitis, Meningococcal / Q000635:transmission; D011051:Poliomyelitis / Q000635:transmission; D012529:Saudi Arabia / Q000453:epidemiology; D014195:Travel; D014611:Vaccination; D014944:World Health Organization; D015004:Yellow Fever / Q000635:transmission