title: Update: influenza activity--United States and worldwide, May 21-September 9, 2006.
abstract: In the United States, CDC uses seven systems for national influenza surveillance, four of which operate year-round: 1) the World Health Organization (WHO) and the National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratory systems; 2) the U.S. Influenza Sentinel Provider Surveillance System; 3) the 122 Cities Mortality Reporting System; and 4) a national surveillance system that records pediatric deaths associated with laboratory-confirmed influenza. Data from these four systems are included in this report.
mesh_terms: D014943:Global Health; D006801:Humans; D053124:Influenza A Virus, H5N1 Subtype; D009980:Influenza A virus; D009981:Influenza B virus; D007251:Influenza, Human / Q000453:epidemiology* / Q000821:virology; D014481:United States / Q000453:epidemiology