Abstract
Background: Incidence and severity of herpes zoster (HZ) and postherpetic neuralgia increase with age, associated with age-related decrease in immunity to varicella-zoster virus (VZV). One dose of zoster vaccine (ZV) has demonstrated substantial protection against HZ; this study examined impact of a second dose of ZV. Methods: Randomized, double-blind, multicenter study with 210 subjects >= 60 years old compared immunity and safety profiles after one and two doses of ZV, separated by 6 weeks, vs. placebo. lmmunogenicity was evaluated using VZV interferon-gamma (IFN-gamma) enzyme-linked immunospot (ELISPOT) assay and VZV glycoprotein enzyme-linked immunosorbent antibody (gpELISA) assay. Adverse experiences (AEs) were recorded on a standardized Vaccination Report Card. Results: No serious vaccine-related AEs occurred. VZV IFN-gamma ELISPOT geometric mean count (GMC) of spot-forming cells per 106 peripheral blood mononuclear cells increased in the ZV group from 16.9 prevaccination to 49.5 and 32.8 at 2 and 6 weeks postdose 1, respectively. Two weeks, 6 weeks and 6 months postdose 2, GMC was 44.3, 42.9, and 36.5, respectively. GMC in the placebo group did not change during the study. The peak ELISPOT response occurred similar to 2 weeks after each ZV dose. The gpELISA geometric mean titers (GMTs) in the ZV group were higher than in the placebo group at 6 weeks after each dose. Correlation between the IFN-gamma ELISPOT and gpELISA assays was poor. Conclusions: ZV was generally well-tolerated and immunogenic in adults >= 60 years old. A second dose of ZV was generally safe, but did not boost VZV-specific immunity beyond levels achieved postdose 1. (C) 2011 Elsevier Ltd. All rights reserved
| Original language | English |
|---|---|
| Pages (from-to) | 904-910 |
| Journal | Vaccine |
| Volume | 30 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2012 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 3 Good Health and Well-being
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