Health conditions for travellers to Saudi Arabia. Pilgrimage to Mecca (Hajj).
D003906:Developing Countries; D004165:Diphtheria / Q000517:prevention & control*; D006304:Health Status; D006801:Humans; D008585:Meningitis, Meningococcal / Q000517:prevention & control*; D012529:Saudi Arabia; D014195:Travel; D014611:Vaccination; D015004:Yellow Fever / Q000517:prevention & control*