title: Health conditions for   travellers to Saudi Arabia   for the pilgrimage   to Mecca (Hajj).
mesh_terms: D000349:Africa / Q000208:ethnology; D000569:Americas / Q000208:ethnology; D006801:Humans; D007514:Islam; D008585:Meningitis, Meningococcal / Q000517:prevention & control; D011051:Poliomyelitis / Q000517:prevention & control; D011159:Population Surveillance; D012529:Saudi Arabia; D014195:Travel