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  • Title: Immunogenicity and safety of a cell culture-derived inactivated trivalent influenza vaccine (NBP607): A randomized, double-blind, multi-center, phase 3 clinical trial.
    Author: Song JY, Cheong HJ, Lee J, Woo HJ, Wie SH, Lee JS, Kim SW, Noh JY, Choi WS, Kim H, Kim KH, Kim WJ.
    Journal: Vaccine; 2015 Oct 05; 33(41):5437-5444. PubMed ID: 26314625.
    Abstract:
    BACKGROUND: Cell culture-derived influenza vaccines (CCIVs) have several important advantages over egg-based influenza vaccines, including shorter production time, better preservation of wild-type virus antigenicity and large-scale production capacity. METHODS: A randomized, double-blind, phase 3 trial was undertaken to evaluate the immunogenicity and safety of a novel cell culture-derived inactivated, subunit, trivalent influenza vaccine (NBP607, SK Chemicals, Seongnam, Korea) compared to the control vaccine (AgrippalS1, Novartis Vaccines and Diagnostics Srl, Siena, Italy) among healthy adults aged 19 years or older (Clinical trial Number-NCT02344134). Immunogenicity was determined at pre-vaccination, 1 month and 6 month post-vaccination by the hemagglutination inhibition assay. Solicited and unsolicited adverse events were assessed after vaccination. RESULTS: A total of 1156 healthy subjects were recruited. NBP607 met all of the criteria of Committee for Medicinal Products for Human Use (CHMP) at 21 days post-vaccination. Contrary to NBP607, the control vaccine did not satisfy the seroconversion criteria for influenza B irrespective of age. Although the geometric mean titer for each influenza subtype declined gradually, seroprotection rate still remained ≥80% for all subtypes up to six month after NBP607 administration. NBP607 recipients met the seroprotection criteria for all three influenza subtypes up to 6 month post-vaccination. There was no significant difference in the occurrence of adverse events between the NBP607 and control groups. CONCLUSION: NBP607, a novel CCIV, showed excellent immunogenicity that lasted ≥6 months after vaccination and had tolerable safety profiles. In particular, NBP607 was more immunogenic against influenza B compared to the control, an egg-based subunit vaccine.
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