A 2013/2014 northern hemisphere season surface antigen inactivated trivalent influenza vaccine--Assessing the immunogenicity and safety in an open label, uncontrolled study.

The present study evaluated the safety and immunogenicity of the 2013/2014 trivalent surface antigen inactivated subunit seasonal influenza virus vaccine Fluvirin® in healthy adults (18 - ≤ 60 years) and elderly (>60 years). The vaccine contained 15 µg haemagglutinin protein from each of influenza A/California/7/2009 (H1N1)pdm09-like strain, A/Victoria/361/2011 (H3N2)-like strain and B/Massachusetts/2/2012-like strain (B/Yamagata) as recommended by the WHO in the 2013/2014 Northern Hemisphere season. Antibody response to each influenza antigen after vaccination was measured prior to vaccination and 21 d after by single radial hemolysis (SRH) assay or hemagglutination inhibition (HI) assay in accordance with Guidance CPMP/BWP/214/96.