A historically-controlled Phase III study in adults to characterize the acceptability of a process change for manufacturing inactivated quadrivalent influenza vaccine.
BMC Infect Dis
; 14: 133, 2014 Mar 10.
Article
en En
| MEDLINE
| ID: mdl-24606983
ABSTRACT
BACKGROUND:
An inactivated quadrivalent influenza vaccine (QIV) was recently licenced in the US as a thimerosal-free formulation presented in a pre-filled syringe. A multidose presentation is preferred in some settings due to reduced acquisition and cold storage costs. We assessed the immunogenicity and safety of a thimerosal-containing QIV formulated using a new manufacturing process for presentation in multidose vials.METHODS:
Two Phase III non-randomized studies separately evaluated inactivated trivalent influenza vaccine (TIV; 2010-2011; historical control) and a QIV (2011-2012). The QIV contained the same strains as the TIV plus an additional B strain. Both vaccines contained thimerosal to allow multidose presentation this preservative was added to the QIV during the final formulation step using a new process, whereas it was added to the TIV early in the manufacturing process using an established method. The TIV study included 50 and 70 subjects aged 18-60 and >60 years, respectively; the QIV study included 56 subjects in each age stratum. Immunogenicity was assessed using hemagglutination-inhibition (HI) assays. Reactogenicity was assessed during the 4-day post-vaccination periods and unsolicited adverse events (AEs) were assessed during the 21-day post-vaccination periods.RESULTS:
The TIV and QIV were immunogenic in both age strata. With the QIV and TIV respectively, the seroconversion rates were 48.2-62.7% and 71.4-83.7% for influenza A, and 33.9-62.5% and 67.3-72.9% for influenza B. With the QIV and TIV respectively, the seroprotection rates were 92.9-98.2% and 98.2-100% for influenza A, and 88.6-100% and 95.9-98.6% for influenza B. Pre-vaccination titers were higher in the QIV versus TIV study which confounds a direct comparison and likely explains the lower seroconversion rates observed in the QIV study. There were no safety concerns raised with TIV or QIV.CONCLUSIONS:
The thimerosal-containing QIV formulated using a new process was immunogenic, conforming to regulatory acceptance criteria, with a reactogenicity and safety profile in line with the TIV manufactured using a licensed process. These results support acceptability of a manufacturing process change in which the thimerosal preservative is added at the point at which batches are filled into multidose vials. TRIAL REGISTRATION These trials were registered at ClinicalTrials.gov NCT01440387; NCT01153685.
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Vacunas contra la Influenza
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Gripe Humana
Tipo de estudio:
Clinical_trials
Límite:
Adolescent
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Adult
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
BMC Infect Dis
Asunto de la revista:
DOENCAS TRANSMISSIVEIS
Año:
2014
Tipo del documento:
Article
País de afiliación:
Estados Unidos