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  • Title: Immunogenicity, safety, and antibody persistence at 3, 5, and 10 years postvaccination in adolescents randomized to booster immunization with a combined tetanus, diphtheria, 5-component acellular pertussis, and inactivated poliomyelitis vaccine administered with a hepatitis B virus vaccine concurrently or 1 month apart.
    Author: Embree J, Law B, Voloshen T, Tomovici A.
    Journal: Clin Vaccine Immunol; 2015 Mar; 22(3):282-90. PubMed ID: 25540274.
    Abstract:
    An understanding of the antibody persistence elicited by a combined tetanus, diphtheria, 5-component acellular pertussis, and inactivated poliovirus vaccine (Tdap-IPV) after adolescent vaccination is important to optimize booster dosing intervals. Our objectives were to compare the safety and immunogenicity of Tdap-IPV coadministered with hepatitis B vaccine (HepB) and sequential administration and evaluate humoral immunity at 3, 5, and 10 years after Tdap-IPV vaccination in adolescents. This phase II randomized, controlled, and open-label study enrolled 280 11- to 14-year-old adolescents with up to 10 years postvaccination follow-up. Group 1 (n = 145) received Tdap-IPV, followed by a HepB dose 1 month later, and group 2 (n = 135) received both vaccines simultaneously. No consistent increases in solicited reactions or unsolicited adverse events occurred with coadministration. All vaccinees attained seroprotective antibody levels at ≥0.01 IU/ml for diphtheria and tetanus, at a ≥1:8 dilution for poliovirus (serotypes 1, 2, and 3), and ≥10 mIU/ml for hepatitis B at 1 month postvaccination. Clinically relevant immunologic interactions did not occur with coadministration. For pertussis, all participants achieved seropositivity levels (at or above the lower limit of quantitation), and 72.7% to 95.8% had 4-fold increases in pertussis antibodies at 1 month postvaccination. At 10 years postvaccination, the remaining participants (62.8% of the original cohort) maintained seroprotective levels of ≥0.01 IU/ml for diphtheria and tetanus, a ≥1:8 dilution for all 3 poliovirus serotypes, and 74.1% to 98.2% maintained pertussis seropositivity levels depending on the antigen tested. There were no differences between the groups. These results support the coadministration of Tdap-IPV and HepB to adolescents and suggest that vaccination with Tdap-IPV can offer protection for 10 years after an adolescent booster vaccination.
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