Pilgrimage to Mecca (Hajj) 1992.
D001428:Bacterial Vaccines / Q000008:administration & dosage*; D006801:Humans; D008585:Meningitis, Meningococcal / Q000517:prevention & control*; D022401:Meningococcal Vaccines; D012529:Saudi Arabia; D014195:Travel
D001428:Bacterial Vaccines; D022401:Meningococcal Vaccines