title: Hajj and the risk of influenza.
authors.forename: A Rashid
authors.initials: AR
authors.lastname: Gatrad
authors.forename: Shuja
authors.initials: S
authors.lastname: Shafi
authors.forename: Ziad A
authors.initials: ZA
authors.lastname: Memish
authors.forename: Aziz
authors.initials: A
authors.lastname: Sheikh
mesh_terms: D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control; D007514:Islam; D012307:Risk Factors; D012529:Saudi Arabia / Q000453:epidemiology; D014195:Travel
chemical_list: D007252:Influenza Vaccines