Meningococcal infection in children visiting Majorca.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D006801:Humans; D008585:Meningitis, Meningococcal / Q000453:epidemiology / Q000635:transmission; D012307:Risk Factors; D013030:Spain / Q000453:epidemiology; D014195:Travel