title: Mecca bound: the challenges ahead.
authors.affiliation: Department of Medicine, King Fahad National Guard Hospital, Riyadh, Saudi Arabia.
authors.forename: Ziad A
authors.initials: ZA
authors.lastname: Memish
authors.forename: Qanta A A
authors.initials: QA
authors.lastname: Ahmed
mesh_terms: D003140:Communicable Disease Control / Q000458:organization & administration*; D006801:Humans; D007514:Islam; D011634:Public Health; D012529:Saudi Arabia; D014195:Travel