title: Influenza vaccination effectiveness, unmeasured confounding, and immunomodulatory treatment.
authors.affiliation: Sergy Haut, France.
authors.forename: David S
authors.initials: DS
authors.lastname: Fedson
mesh_terms: D005260:Female; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000472:pathogenicity*; D007252:Influenza Vaccines / Q000627:therapeutic use*; D007251:Influenza, Human / Q000517:prevention & control*; D008297:Male; D058873:Pandemics / Q000517:prevention & control*
chemical_list: D007252:Influenza Vaccines