Qualification of the hemagglutination inhibition assay in support of pandemic influenza vaccine licensure.
2009 Apr
Journal Article
Authors:
Noah, D.L.;
Hill, H.;
Hines, D.;
White, L.;
Wolff, M.C.
Secondary:
Clin Vaccine Immunol
Volume:
16
Pagination:
558-66
Issue:
4
PMID:
19225073
Keywords:
Animals; Antibodies, Viral; Drug Approval; Erythrocytes; Hemagglutination Inhibition Tests; Horses; Humans; Influenza A Virus, H5N1 Subtype; Influenza Vaccines
Abstract:
Continued outbreaks of highly pathogenic avian influenza over the past decade have spurred global efforts to develop antivirals and vaccines. As part of vaccine development, standard methods are needed for determining serum antibody titers in response to vaccination. Hemagglutination inhibition (HAI) assays are appropriate for assessing the immunogenicity of pandemic influenza vaccines in support of license approval. We demonstrate that a rigorous qualification of the HAI assay for H5N1 influenza virus, evaluating for precision, intermediate precision, linearity, range, specificity, and robustness, satisfies the intent of regulatory guidance for assay validation despite the lack of availability of specific reference standard antigens and antisera.
