title: [Pneumonia during influenza epidemic (November-December, 1971)].
mesh_terms: D000328:Adult; D000368:Aged; D004196:Disease Outbreaks; D006801:Humans; D007251:Influenza, Human / Q000150:complications*; D008875:Middle Aged; D018184:Paramyxoviridae Infections / Q000150:complications; D011014:Pneumonia / Q000209:etiology*; D011044:Poland
vernacular_title: Zapalenie płuc podczas epidemii grypy (listopad-grudzień 1971 r.