[Characteristics of meningococcal carrier state in children's and adolescents' collectives in Leningrad].
D000293:Adolescent; D002353:Carrier State / Q000453:epidemiology*; D002648:Child; D006801:Humans; D008589:Meningococcal Infections / Q000453:epidemiology*
Kharakteristika meningokokkovogo nositel'stva v detskikh i iunosheskikh kollektivakh v Leningrade