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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
Authors: Prasert Thongcharoen
Prasert Auewarakul
Yanee Hutagalung
Gary Ong
Paul Gillard
Mamadou Drame
Hans L. Bock
Mahidol University
Keywords: Medicine
Issue Date: 1-Aug-2011
Citation: Journal of the Medical Association of Thailand. Vol.94, No.8 (2011), 916-926
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.
ISSN: 01252208
Appears in Collections:Scopus 2011-2015

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