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Updated: Jul 6, 2026

An Optimized Hemagglutination Inhibition (HI) Assay to Quantify Influenza-specific Antibody Titers
Published on: December 1, 2017
Antibody response to hepatitis A immunization among human immunodeficiency virus-infected children and adolescents
George K Siberry1, Ryan J Coller, Emily Henkle
1Department of Pediatrics, Johns Hopkins Medical Institutions, Baltimore, MD, USA. gsiberr1@jhmi.edu
Abstract:
Seventy-one of 84 human immunodeficiency virus (HIV)-infected children [84.5% (95% confidence interval: 75-91.5%)] were hepatitis A virus (HAV) seropositive after 2 doses of HAV vaccine. Higher CD4% and HIV suppression were significantly associated with increased HAV seropositivity rate. In multivariate analysis, CD4 >or=25% and young age were independent predictors of HAV seropositivity. Of 7 children given a third HAV vaccine dose because of negative HAV antibody after 2 doses, 2 (29%) became seropositive.
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