National and global influenza surveillance systems and reports

WHO Guidance for Surveillance during an Influenza Pandemic

This guidance is an update to an earlier document “Global surveillance during an influenza pandemic”, published in April 2009. It takes the lesions learned from the 2009 influenza pandemic into consideration and focuses on the key surveillance components needed during an influenza pandemic. The purpose of the updated guidance is to outline the surveillance strategies and essential data requirements that Member States can use throughout the course of an influenza pandemic to ensure informed risk management decisions in pandemic response and fulfilment of IHR (2005) core capacity requirements.