Publication: Cross-clade immunogenicity and antigen-sparing with an AS03<inf>A</inf>-adjuvanted prepandemic influenza vaccine in a Thai population
Issued Date
2011-08-01
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ISSN
01252208
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2-s2.0-79961186873
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of the Medical Association of Thailand. Vol.94, No.8 (2011), 916-926
Suggested Citation
Prasert Thongcharoen, Prasert Auewarakul, Yanee Hutagalung, Gary Ong, Paul Gillard, Mamadou Drame, Hans L. Bock Cross-clade immunogenicity and antigen-sparing with an AS03<inf>A</inf>-adjuvanted prepandemic influenza vaccine in a Thai population. Journal of the Medical Association of Thailand. Vol.94, No.8 (2011), 916-926. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/12405
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Title
Cross-clade immunogenicity and antigen-sparing with an AS03<inf>A</inf>-adjuvanted prepandemic influenza vaccine in a Thai population
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Abstract
Objective: The present study (NCT00449670) in Asian subjects (18-60 years) evaluated the manufacturing consistency of four formulations of 3.75mg AS03 A -adjuvanted H5N1 influenza vaccine, in terms of post-immunization Hemagglutination Inhibition (HI) titers against the A/Vietnam/1194/2004 and A/Indonesia/05/2005 strains. The immunogenicity and safety of the vaccine in the Thai population are reported herein. Material and Method: Subjects were randomized (2:2:2:2:1:1) between four vaccine groups and two control groups to receive two doses of either the AS03 A -adjuvanted or non-adjuvanted H5N1 vaccine formulations, 21 days apart. Sera were assayed for HI antibody titers against the two strains. Results: After the second dose of AS03 A -adjuvanted vaccine, 94.2% subjects in the H5N1-AS03 A groups seroconverted and 94.9% subjects were seroprotected against the A/Vietnam/1194/2004 strain. Cross-clade immune response against the A/Indonesia/05/2005 strain was observed. All vaccine formulations had an acceptable safety profile. Conclusion: This antigen-sparing AS03 A -adjuvanted influenza vaccine could be a suitable candidate for combating and mitigating future influenza pandemics.