[Influenza epidemic in Poland in 1971].
D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks / Q000453:epidemiology*; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology* / Q000401:mortality; D011044:Poland
Epidemia grypy w Polsce w 1971.