title: Health conditions for travellers to Saudi Arabia pilgrimage to Mecca (Hajj).
mesh_terms: D003906:Developing Countries; D004196:Disease Outbreaks / Q000517:prevention & control*; D005502:Food; D006304:Health Status; D006801:Humans; D007252:Influenza Vaccines; D007514:Islam; D008585:Meningitis, Meningococcal / Q000517:prevention & control*; D022401:Meningococcal Vaccines; D012529:Saudi Arabia; D014195:Travel; D014611:Vaccination; D015004:Yellow Fever / Q000517:prevention & control*
chemical_list: D007252:Influenza Vaccines; D022401:Meningococcal Vaccines