title: Influenza Vaccine Effectiveness: Mysteries, Enigmas, and a Few Clues.
authors.affiliation: Division of Pediatric Infectious Diseases, University of Utah School of Medicine, Salt Lake City.
authors.forename: Andrew T
authors.initials: AT
authors.lastname: Pavia
mesh_terms: D016022:Case-Control Studies; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000276:immunology; D007252:Influenza Vaccines / Q000276:immunology*; D007251:Influenza, Human / Q000517:prevention & control*
chemical_list: D007252:Influenza Vaccines
keywords: case-control studies; influenza vaccine; influenza vaccine effectiveness; influenza virus; vaccine effectiveness