[A study on the epidemic characteristics of influenza in Qingdao].
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D000907:Antibodies, Bacterial / Q000032:analysis; D002681:China; D005260:Female; D006801:Humans; D009980:Influenza A virus / Q000276:immunology; D009981:Influenza B virus / Q000276:immunology; D007251:Influenza, Human / Q000453:epidemiology*; D008297:Male
D000907:Antibodies, Bacterial