Journal
VACCINE
Volume 28, Issue 25, Pages 4123-4129Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.vaccine.2010.04.030
Keywords
Influenza; MF59; Cross-protection
Categories
Funding
- WHO Influenza Centre, London
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MF59 is already known to enhance the breadth of antibody response to mismatched influenza seasonal and avian strains. However, little is known on the effect of MF59 on immunogenicity of influenza vaccines when apparent good matching between circulating and vaccine strains exists. To this end, we compared the immune response elicited by MF59-adjuvanted or non-adjuvanted subunit vaccine, containing A/California/7/04(H3N2) strain, against circulating viruses isolated between 2004/2005 and 2006/2007 seasons, belonging to different clades. The advantage offered by MF59 in terms of higher immunogenicity, expressed as higher post-vaccination HI titres, is observable also against viruses showing antigenic and molecular pattern undistinguishable from vaccine strain, but it became even more evident as the antigenic and molecular distance between vaccine and circulating strains grew. These data show that seasonal influenza vaccine adjuvanted with MF59 can offer a stronger benefit as compared to non-adjuvanted vaccine in protecting against a broader range of virus strains circulating during the influenza season. (C) 2010 Elsevier Ltd. All rights reserved.
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