Antigenic and genetic characteristics of A(H5N1), A(H7N3), A(H9N2) and variant influenza viruses and candidate vaccine viruses developed for potential use in human vaccines
February 2013
This summary provides a review on the A(H5N1), A(H7N3), A(H9N2) and variant influenza virus activity and virus characterization, and describes the current status of the development of candidate vaccine viruses for pandemic preparedness purposes. It is meant to provide guidance for national authorities and vaccine companies on the selection of candidate viruses for use in vaccine development.