Pandemic (H1N1) 2009 influenza: surveillance and epidemiology

Regular epidemiological reports were provided throughout the 2009 pandemic. These pages are retained for reference only.

• All reports are available in the archive.
• Information on the different surveillance systems used to monitor the pandemic is available.  
• International influenza activity was also monitored. 

For information on the current influenza season, please visit the Seasonal Influenza pages.