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
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.
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