title: Low hemagglutinin-titer strains of pandemic influenza A (H1N1) 2009 virus circulated in Toyama Prefecture, Japan, during the 2009-2011 influenza seasons.
authors.affiliation: Department of Virology, Toyama Institute of Health, Toyama 939-0363, Japan. masatsugu.obuchi＠pref.toyama.lg.jp
authors.forename: Masatsugu
authors.initials: M
authors.lastname: Obuchi
authors.forename: Masaru
authors.initials: M
authors.lastname: Yokoyama
authors.forename: Eiji
authors.initials: E
authors.lastname: Horimoto
authors.forename: Mayumi
authors.initials: M
authors.lastname: Obara
authors.forename: Masae
authors.initials: M
authors.lastname: Iwai
authors.forename: Hironori
authors.initials: H
authors.lastname: Sato
authors.forename: Tetsutaro
authors.initials: T
authors.lastname: Sata
authors.forename: Takenori
authors.initials: T
authors.lastname: Takizawa
mesh_terms: D016000:Cluster Analysis; D005838:Genotype; D019267:Hemagglutinin Glycoproteins, Influenza Virus / Q000235:genetics / Q000276:immunology*; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype / Q000276:immunology*; D007251:Influenza, Human / Q000276:immunology* / Q000821:virology*; D007564:Japan; D008958:Models, Molecular; D008969:Molecular Sequence Data; D010802:Phylogeny; D020836:Protein Structure, Quaternary; D012367:RNA, Viral / Q000235:genetics; D017422:Sequence Analysis, DNA
chemical_list: D019267:Hemagglutinin Glycoproteins, Influenza Virus; D012367:RNA, Viral