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  • Title: Functional and antigenic analyses of the 1918 influenza virus haemagglutinin using a recombinant vaccinia virus expression system.
    Author: Elliot AJ, Steinhauer DA, Daniels RS, Oxford JS.
    Journal: Virus Res; 2006 Dec; 122(1-2):11-9. PubMed ID: 16904219.
    Abstract:
    The influenza pandemic of 1918 caused unprecedented levels of morbidity and mortality in its 12-month period of circulation around the globe. The haemagglutinin molecule has been shown to affect the pathogenicity of some subtypes of influenza A viruses. Using a recombinant vaccinia system that allowed expression of the 1918 influenza haemagglutinin, we performed functional assays to assess the glycoprotein's involvement in determining the high pathogenicity of the 1918 virus. We show that in respect of expression levels, proteolytic processing, receptor-binding, membrane fusion and antigenic properties, the haemagglutinin of the 1918 virus is unremarkable when compared with the haemagglutinins of other 'early' H1 influenza viruses. This suggests that whilst the 1918 haemagglutinin, as a new/novel antigen in the human population, was responsible for the influenza pandemic its functions per se were not responsible for the high mortality and acute symptoms experienced by patients infected with the 1918 influenza virus.
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