Sporadic cases of meningococcal disease in schools. PHLS Meningococcal Infections Working Group.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D004739:England; D006801:Humans; D008589:Meningococcal Infections / Q000517:prevention & control*; D012574:Schools; D014852:Wales