title: [Influenza surveillance in Japan].
authors.affiliation: National Institute of Infectious Diseases.
authors.forename: Nobuhiko
authors.initials: N
authors.lastname: Okabe
mesh_terms: D004196:Disease Outbreaks; D006801:Humans; D009980:Influenza A virus / Q000302:isolation & purification; D009981:Influenza B virus / Q000302:isolation & purification; D007251:Influenza, Human / Q000453:epidemiology* / Q000821:virology; D007564:Japan / Q000453:epidemiology; D012621:Seasons; D018571:Sentinel Surveillance