Pandemic influenza risk management: a WHO guide to inform and harmonize national and international pandemic preparedness and response

Overview

Influenza pandemics are unpredictable but recurring events that can have consequences on human health and economic well-being worldwide. Advance planning and preparedness are critical to help mitigate the impact of a pandemic. This WHO guidance document, Pandemic Influenza Risk Management, updates and replaces Pandemic influenza preparedness and response: WHO guidance document, which was published in 2009. This revision of the guidance takes account of lessons learned from the influenza A(H1N1) 2009 pandemic and of other relevant developments.