Use of specific pandemic influenza vaccines during the H1N1 2009 pandemic (ECDC Interim guidance)

This guidance is based on the current scenario of the A(H1N1) 2009 pandemic. Particular areas of uncertainty are noted and discussed. As more data, evidence and opinions become available this document will be updated along with the ECDC risk assessment to which it is linked Based on the experience from previous pandemics, during which the pathogenicity and transmissibility of the virus increased over time, three other scenarios are presented. There are also annexes summarising the evidence for vaccination of particular risk groups for seasonal influenza and the current pandemic influenza and giving broad estimates of the size of the risk and target groups. The basis for the calculation is given in sufficient detail that people in the Member States can apply the methodology to their own population or compare the methods already used.