title: [Variability in the symptoms of influenza].
authors.affiliation: Centre national de référence Grippe France-Sud, laboratoire de virologie, CHU Lyon, France.
authors.forename: M
authors.initials: M
authors.lastname: Valette
authors.forename: M
authors.initials: M
authors.lastname: Aymard
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D005260:Female; D006760:Hospitalization; D006801:Humans; D007251:Influenza, Human / Q000150:complications / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012720:Severity of Illness Index