title: [Pedagogic ruminations. VI. Classification. Basic principles of prevention].
mesh_terms: D003140:Communicable Disease Control; D003141:Communicable Diseases / Q000145:classification*; D006801:Humans; D007239:Infections; D014586:USSR
vernacular_title: Pedagogicheskie razdum'ia. Soobshchenie VI. Klassifikatsiia. Osnovnye printsipy profilaktiki