Laboratory evidence of influenza in Canada.
D000914:Antibodies, Viral / Q000032:analysis*; D002170:Canada; D006801:Humans; D009980:Influenza A virus / Q000276:immunology*; D009981:Influenza B virus / Q000276:immunology*; D007251:Influenza, Human / Q000175:diagnosis*
D000914:Antibodies, Viral