title: Meningococcal infection in pilgrims returning from the Haj: update.
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D002353:Carrier State / Q000635:transmission*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D015994:Incidence; D007223:Infant; D007514:Islam; D008297:Male; D008589:Meningococcal Infections / Q000453:epidemiology* / Q000209:etiology*; D008875:Middle Aged; D012307:Risk Factors; D012529:Saudi Arabia / Q000453:epidemiology; D017678:Sex Distribution; D014195:Travel; D006113:United Kingdom / Q000208:ethnology