title: Health conditions for travellers to Saudi Arabia for the pilgrimage to Mecca (Hajj).
mesh_terms: D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype; D007251:Influenza, Human / Q000517:prevention & control; D007514:Islam; D008585:Meningitis, Meningococcal / Q000517:prevention & control; D010930:Plague / Q000517:prevention & control; D011051:Poliomyelitis / Q000517:prevention & control; D011159:Population Surveillance; D012529:Saudi Arabia; D014195:Travel; D015004:Yellow Fever / Q000517:prevention & control