| Literature DB >> 23908481 |
Sophia Ng1, Vicky J Fang, Dennis K M Ip, Kwok-Hung Chan, Gabriel M Leung, J S Malik Peiris, Benjamin J Cowling.
Abstract
Antibody titers measured by hemagglutination inhibition (HAI) correlate with protection against influenza virus infection and are used to specify criteria for vaccine licensure. In a randomized, controlled trial of seasonal influenza vaccination in 773 children aged 6-17 years, we estimated that HAI titers of 1:40 against A(H1N1)pdm09 and B(Victoria lineage) were associated with 48% (95% confidence interval [CI], 30%-62%) and 55% (95% CI, 32%-70%) protection against PCR-confirmed infection with each strain. Our analysis accounted for waning in antibody titers over time, and could be particularly useful in settings where influenza activity is delayed or prolonged relative to measurement of antibody titers.Entities:
Keywords: antibody; children; immunity; influenza; vaccine
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Year: 2013 PMID: 23908481 PMCID: PMC3778972 DOI: 10.1093/infdis/jit372
Source DB: PubMed Journal: J Infect Dis ISSN: 0022-1899 Impact factor: 5.226