Volume 12, Number 4, April 2006

Human Influenza Surveillance: the Demand to Expand

Scott P. Layne*
*University of California at Los Angeles, Los Angeles, California, USA

Figure 1. Global influenza surveillance for the 2004–2005 season. Respiratory samples were collected from persons with febrile respiratory illness worldwide. Approximately 15% of samples were influenza positive. Note that only some of the type A viruses were subtyped. Data are from the Centers for Disease Control and Prevention website (http://www.cdc.gov/flu/weekly/weeklyarchives2004-2005/04-05summary.htm).

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This page last reviewed March 21, 2006

Emerging Infectious Diseases Journal
National Center for Infectious Diseases
Centers for Disease Control and Prevention