Journal article

Population susceptibility to a variant swine-origin influenza virus A(H3N2) in Vietnam, 2011-2012.

LNM Hoa, JE Bryant, M Choisy, LA Nguyet, NT Bao, NH Trang, NTK Chuc, TK Toan, T Saito, N Takemae, P Horby, H Wertheim, A Fox

Epidemiology and Infection | Published : 2015


A reassortant swine-origin A(H3N2) virus (A/swine/BinhDuong/03-9/2010) was detected through swine surveillance programmes in southern Vietnam in 2010. This virus contains haemagglutinin and neuraminidase genes from a human A(H3N2) virus circulating around 2004-2006, and the internal genes from triple-reassortant swine influenza A viruses (IAVs). To assess population susceptibility to this virus we measured haemagglutination inhibiting (HI) titres to A/swine/BinhDuong/03-9/2010 and to seasonal A/Perth/16/2009 for 947 sera collected from urban and rural Vietnamese people during 2011-2012. Seroprevalence (HI ⩾ 40) was high and similar for both viruses, with 62·6% [95% confidence interval (CI) 5..

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