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The Adjuvanted Recombinant Zoster Vaccine Confers Long-Term Protection Against Herpes Zoster: Interim Results of an Extension Study of the Pivotal Phase 3 Clinical Trials ZOE-50 and ZOE-70
Aixial, BEL.
GlaxoSmithKline (GSK), USA.
FISABIO Fdn Fomento Invest Sanitaria & Biomed Com, ESP.
Hosp Gen Durango, MEX.
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2022 (English)In: Clinical Infectious Diseases, ISSN 1058-4838, E-ISSN 1537-6591, Vol. 74, no 8, p. 1459-1467Article in journal (Refereed) Published
Abstract [en]

Efficacy against herpes zoster and immune responses to the adjuvanted recombinant zoster vaccine plateaued at high levels between 5.1 and 7.1 years (mean) post-vaccination, suggesting that its clinical benefit in older adults is sustained for at least 7 years post-vaccination. Background This ongoing follow-up study evaluated the persistence of efficacy and immune responses for 6 additional years in adults vaccinated with the glycoprotein E (gE)-based adjuvanted recombinant zoster vaccine (RZV) at age >= 50 years in 2 pivotal efficacy trials (ZOE-50 and ZOE-70). The present interim analysis was performed after >= 2 additional years of follow-up (between 5.1 and 7.1 years [mean] post-vaccination) and includes partial data for year (Y) 8 post-vaccination. Methods Annual assessments were performed for efficacy against herpes zoster (HZ) from Y6 post-vaccination and for anti-gE antibody concentrations and gE-specific CD4[2+] T-cell (expressing >= 2 of 4 assessed activation markers) frequencies from Y5 post-vaccination. Results Of 7413 participants enrolled for the long-term efficacy assessment, 7277 (mean age at vaccination, 67.2 years), 813, and 108 were included in the cohorts evaluating efficacy, humoral immune responses, and cell-mediated immune responses, respectively. Efficacy of RZV against HZ through this interim analysis was 84.0% (95% confidence interval [CI], 75.9-89.8) from the start of this follow-up study and 90.9% (95% CI, 88.2-93.2) from vaccination in ZOE-50/70. Annual vaccine efficacy estimates were >84% for each year since vaccination and remained stable through this interim analysis. Anti-gE antibody geometric mean concentrations and median frequencies of gE-specific CD4[2+] T cells reached a plateau at approximately 6-fold above pre-vaccination levels. Conclusions Efficacy against HZ and immune responses to RZV remained high, suggesting that the clinical benefit of RZV in older adults is sustained for at least 7 years post-vaccination.

Place, publisher, year, edition, pages
Oxford University Press, 2022. Vol. 74, no 8, p. 1459-1467
Keywords [en]
adjuvanted recombinant zoster vaccine, long-term efficacy, immune response persistence, SUBUNIT VACCINE, EPIDEMIOLOGY, EFFICACY
National Category
Immunology in the medical area Microbiology in the medical area
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URN: urn:nbn:se:bth-22679DOI: 10.1093/cid/ciab629ISI: 000756453800001PubMedID: 34283213Scopus ID: 2-s2.0-85116820049OAI: oai:DiVA.org:bth-22679DiVA, id: diva2:1640911
Note

Zoster-049 Study Group

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Available from: 2022-02-28 Created: 2022-02-28 Last updated: 2022-05-25Bibliographically approved

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Sanmartin Berglund, Johan

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