Lack of cross-immune reactivity against influenza H5N1 from seasonal influenza vaccine in humans

✍ Scribed by Julian W. Tang; Karry L.K. Ngai; Paul K.S. Chan

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 76 KB
• Volume: 80
• Category: Article
• ISSN: 0146-6615
• DOI: 10.1002/jmv.21321

✦ Synopsis

Abstract

In a small pilot study, sera from 10 healthy human volunteers were taken pre‐vaccine, then 1, 3, and 6 months post‐seasonal influenza immunization (using the 2005/2006 Northern hemisphere vaccine: A/New Caledonia/20/99(H1N1)‐like, A/California/7/2004(H3N2)‐like, and B/Shanghai/361/2002‐like strains). Eight out of 10 subjects demonstrated satisfactory HAI titers (≥40) after seasonal influenza vaccination between 1 and 6 months post‐vaccine. These sera were then tested for inhibitory activity against A/HK/483/97 and A/Thailand/1(KAN‐1)/04 H5N1 influenza viruses using standard hemagglutination inhibition and microneutralization assays. In contrast to several other studies in both humans and animals on the cross‐immunity between different influenza A viruses, antibodies produced to the influenza A(H1N1) component of the seasonal influenza vaccine showed no cross‐reactivity to these avian influenza A(H5N1) viruses. Possible reasons for this contrasting result are discussed. J. Med. Virol. 80:1992–1996, 2008. © 2008 Wiley‐Liss, Inc.