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Meta-Analysis of the Immunogenicity and Tolerability of Pandemic Influenza A 2009 (H1N1) Vaccines

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  • Lamberto Manzoli
  • Corrado De Vito
  • Georgia Salanti
  • Maddalena D'Addario
  • Paolo Villari
  • John PA Ioannidis

Abstract

Background: Although the 2009 (H1N1) influenza pandemic officially ended in August 2010, the virus will probably circulate in future years. Several types of H1N1 vaccines have been tested including various dosages and adjuvants, and meta-analysis is needed to identify the best formulation. Methods: We searched MEDLINE, EMBASE, and nine clinical trial registries to April 2011, in any language for randomized clinical trials (RCTs) on healthy children, adolescents, adults and the elderly. Primary outcome was the seroconversion rate according to hemagglutinination-inhibition (HI); secondary outcomes were adverse events. For the primary outcome, we used head-to-head meta-analysis and multiple-treatments meta-analysis. Results: Eighteen RCTs could be included in all primary analyses, for a total of 76 arms (16,725 subjects). After 2 doses, all 2009 H1N1 split/subunit inactivated vaccines were highly immunogenic and overcome CPMP seroconversion criteria. After 1 dose only, all split/subunit vaccines induced a satisfactory immunogenicity (> = 70%) in adults and adolescents, while only some formulations showed acceptable results for children and elderly (non-adjuvanted at high-doses and oil-in-water adjuvanted vaccines). Vaccines with oil-in-water adjuvants were more immunogenic than both nonadjuvanted and aluminum-adjuvanted vaccines at equal doses and their immunogenicity at doses

Suggested Citation

  • Lamberto Manzoli & Corrado De Vito & Georgia Salanti & Maddalena D'Addario & Paolo Villari & John PA Ioannidis, 2011. "Meta-Analysis of the Immunogenicity and Tolerability of Pandemic Influenza A 2009 (H1N1) Vaccines," PLOS ONE, Public Library of Science, vol. 6(9), pages 1-11, September.
    • Handle: RePEc:plo:pone00:0024384
    DOI: 10.1371/journal.pone.0024384
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    Cited by:

    1. Lee, Choong-Ki & Jung, Eun-Kyo & Kang, Sung-Eun & Petrick, James F. & Park, Yae-Na, 2022. "Impact of perception of COVID-19 on NPI, job satisfaction, and customer orientation: Highlighting three types of NPIs for the airline industry," Journal of Air Transport Management, Elsevier, vol. 100(C).
    2. Patrick Saunders-Hastings & Jane Reisman & Daniel Krewski, 2016. "Assessing the State of Knowledge Regarding the Effectiveness of Interventions to Contain Pandemic Influenza Transmission: A Systematic Review and Narrative Synthesis," PLOS ONE, Public Library of Science, vol. 11(12), pages 1-17, December.

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