Long term immunity to live attenuated Japanese encephalitis chimeric virus vaccine : randomized, double-blind, 5-year phase II study in healthy adults.
Data(s) |
2011
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Resumo |
In a randomized, double-blind study, 202 healthy adults were randomized to receive a live, attenuated Japanese encephalitis chimeric virus vaccine (JE-CV) and placebo 28 days apart in a cross-over design. A subgroup of 98 volunteers received a JE-CV booster at month 6. Safety, immunogenicity, and persistence of antibodies to month 60 were evaluated. There were no unexpected adverse events (AEs) and the incidence of AEs between JE-CV and placebo were similar. There were three serious adverse events (SAE) and no deaths. A moderately severe case of acute viral illness commencing 39 days after placebo administration was the only SAE considered possibly related to immunization. 99% of vaccine recipients achieved a seroprotective antibody titer ≥ 10 to JE-CV 28 days following the single dose of JE-CV, and 97% were seroprotected at month 6. Kaplan Meier analysis showed that after a single dose of JE-CV, 87% of the participants who were seroprotected at month 6 were still protected at month 60. This rate was 96% among those who received a booster immunization at month 6. 95% of subjects developed a neutralizing titer ≥ 10 against at least three of the four strains of a panel of wild-type Japanese encephalitis virus (JEV) strains on day 28 after immunization. At month 60, that proportion was 65% for participants who received a single dose of JE-CV and 75% for the booster group. These results suggest that JE-CV is safe, well tolerated and that a single dose provides long-lasting immunity to wild-type strains |
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application/pdf |
Identificador | |
Publicador |
Landes Bioscience |
Relação |
http://eprints.qut.edu.au/40495/1/COVERSHEET_C40495.pdf DOI:10.4161/hv.6.12.13057 Nasveld, Peter, Ebringer, Andrew, Elmes, Nathan, Bennett, Sonya, Yoksan, Sutee, Aaskov, John G., McCarthy, Karen, Kanesa-thasan, Niranjan, Meric, Claude, & Reid, Mark (2011) Long term immunity to live attenuated Japanese encephalitis chimeric virus vaccine : randomized, double-blind, 5-year phase II study in healthy adults. Human Vaccines, 6(12), pp. 1038-1046. |
Direitos |
Copyright 2010 Landes Bioscience. |
Fonte |
Faculty of Science and Technology; Institute of Health and Biomedical Innovation |
Palavras-Chave | #110804 Medical Virology #Japanese encephalitis #vaccine |
Tipo |
Journal Article |