title: Influenza activity--Canada, 1987-88 season.
authors.forename: E
authors.initials: E
authors.lastname: Bollegraaf
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002170:Canada; D002648:Child; D004196:Disease Outbreaks; D006801:Humans; D009980:Influenza A virus / Q000302:isolation & purification; D009981:Influenza B virus / Q000302:isolation & purification; D007251:Influenza, Human / Q000453:epidemiology*; D008875:Middle Aged