title: Influenza virus activity in Canada.
authors.forename: J M
authors.initials: JM
authors.lastname: Weber
mesh_terms: D002170:Canada; D006801:Humans; D009980:Influenza A virus / Q000302:isolation & purification; D009981:Influenza B virus / Q000302:isolation & purification; D007251:Influenza, Human / Q000382:microbiology*; D012621:Seasons; D012703:Serotyping