title: Commentary: Observational studies and the art of accurately measuring influenza vaccine benefits.
authors.affiliation: Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 6700-B Rockledge Drive, Bethesda, MD 20892, USA. lsimonsen@niaid.nih.gov
authors.forename: Lone
authors.initials: L
authors.lastname: Simonsen
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000517:prevention & control*; D012107:Research Design; D012680:Sensitivity and Specificity; D016896:Treatment Outcome
chemical_list: D007252:Influenza Vaccines