title: Challenge studies.
authors.affiliation: Baylor College of Medicine, Houston, TX 77030, USA.
authors.forename: R B
authors.initials: RB
authors.lastname: Couch
mesh_terms: D006801:Humans; D007252:Influenza Vaccines / Q000008:administration & dosage* / Q000276:immunology; D007251:Influenza, Human / Q000276:immunology / Q000517:prevention & control
chemical_list: D007252:Influenza Vaccines