title: [Clinical analysis of cases of influenza observed in Poland in the years 1969-1971].
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D004196:Disease Outbreaks / Q000453:epidemiology*; D005260:Female; D006801:Humans; D007251:Influenza, Human / Q000150:complications*; D008297:Male; D008875:Middle Aged; D009205:Myocarditis / Q000209:etiology; D009422:Nervous System Diseases / Q000209:etiology; D011014:Pneumonia / Q000209:etiology; D011044:Poland
vernacular_title: Kliniczna analiza przypadków grypy, spostrzeganych w latach 1969-1971