[Epidemiologic observations of pertussis and parapertussis carrier state].
D001885:Bordetella Infections / Q000453:epidemiology*; D002353:Carrier State / Q000453:epidemiology*; D002648:Child; D006801:Humans; D014917:Whooping Cough / Q000453:epidemiology
Epidemiologicheskie nabliudeniia za bakterionositeliami pri kokliushe i parakokliushe