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Hum Vaccin Immunother ; 16(6): 1380-1384, 2020 06 02.
Artigo em Inglês | MEDLINE | ID: mdl-31810418

RESUMO

Annual vaccination is the most effective way to prevent seasonal influenza. Influenza vaccines in multi-dose vial (MDV) formats can facilitate timely vaccination of large populations by reducing per-dose costs and cold storage requirements compared to single-dose pre-filled syringe (PFS) formats. MDV vaccines require thiomersal or another preservative to prevent microbial contamination. We conducted a randomized, open-label trial in 302 healthy subjects aged 6 months to 17 years to evaluate the immunogenicity and safety of a quadrivalent influenza vaccine (QIV) in a thiomersal-containing MDV format compared to the licensed thiomersal-free PFS format. Subjects were randomly assigned in a 1:1 ratio to receive the MDV (n = 153) or PFS (n = 149) format. Post-vaccination hemagglutination inhibition titers for all four vaccine strains were ≥4.9-fold higher than baseline titers with no difference in magnitude between the MDV and PFS groups. Seroconversion rates per strain were also comparable between the two groups. There were no differences in reactogenicity or safety between the two vaccine formats. These results showed that the MDV format of QIV was as safe and immunogenic as the PFS format in infants, children, and adolescents. These findings support the use of MDV QIV as a resource-saving alternative for seasonal influenza vaccination.


Assuntos
Vacinas contra Influenza , Influenza Humana , Adolescente , Anticorpos Antivirais , Criança , Testes de Inibição da Hemaglutinação , Humanos , Imunogenicidade da Vacina , Lactente , Vírus da Influenza B , Vacinas contra Influenza/efeitos adversos , Influenza Humana/prevenção & controle , Vacinas de Produtos Inativados/efeitos adversos
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