Bibliographic Details
| Title: |
Effect of Repeat Vaccination on Immunogenicity of Quadrivalent Cell-Culture and Recombinant Influenza Vaccines Among Healthcare Personnel Aged 18–64 Years: A Randomized, Open-Label Trial. |
| Authors: |
Gaglani, Manjusha, Kim, Sara S, Naleway, Allison L, Levine, Min Z, Edwards, Laura, Murthy, Kempapura, Dunnigan, Kayan, Zunie, Tnelda, Groom, Holly, Ball, Sarah, Jeddy, Zuha, Hunt, Danielle, Wesley, Meredith G, Sambhara, Suryaprakash, Gangappa, Shivaprakash, Grant, Lauren, Cao, Weiping, Gross, F Liaini, Mishina, Margarita, Fry, Alicia M |
| Source: |
Clinical Infectious Diseases; 2/1/2023, Vol. 76 Issue 3, pe1168-e1176, 9p |
| Subject Terms: |
INFLUENZA prevention, INFLUENZA vaccines, STATISTICS, CELL culture, IMMUNOMODULATORS, SEASONS, VACCINE effectiveness, RANDOMIZED controlled trials, PRE-tests & post-tests, COMPARATIVE studies, DESCRIPTIVE statistics, INDUSTRIAL hygiene, STATISTICAL sampling, DATA analysis |
| Geographic Terms: |
UNITED States |
| Abstract: |
Background Antibody responses to non–egg-based standard-dose cell-culture influenza vaccine (containing 15 µg hemagglutinin [HA]/component) and recombinant vaccine (containing 45 µg HA/component) during consecutive seasons have not been studied in the United States. Methods In a randomized trial of immunogenicity of quadrivalent influenza vaccines among healthcare personnel (HCP) aged 18–64 years over 2 consecutive seasons, HCP who received recombinant-HA influenza vaccine (RIV) or cell culture–based inactivated influenza vaccine (ccIIV) during the first season (year 1) were re-randomized the second season of 2019–2020 (year 2 [Y2]) to receive ccIIV or RIV, resulting in 4 ccIIV/RIV combinations. In Y2, hemagglutination inhibition antibody titers against reference cell–grown vaccine viruses were compared in each ccIIV/RIV group with titers among HCP randomized both seasons to receive egg-based, standard-dose inactivated influenza vaccine (IIV) using geometric mean titer (GMT) ratios of Y2 post-vaccination titers. Results Y2 data from 414 HCP were analyzed per protocol. Compared with 60 IIV/IIV recipients, 74 RIV/RIV and 106 ccIIV/RIV recipients showed significantly elevated GMT ratios (Bonferroni corrected P <.007) against all components except A(H3N2). Post-vaccination GMT ratios for ccIIV/ccIIV and RIV/ccIIV were not significantly elevated compared with IIV/IIV except for RIV/ccIIV against A(H1N1)pdm09. Conclusions In adult HCP, receipt of RIV in 2 consecutive seasons or the second season was more immunogenic than consecutive egg-based IIV for 3 of the 4 components of quadrivalent vaccine. Immunogenicity of ccIIV/ccIIV was similar to that of IIV/IIV. Differences in HA antigen content may play a role in immunogenicity of influenza vaccination in consecutive seasons. Clinical Trials Registration NCT03722589. [ABSTRACT FROM AUTHOR] |
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| Database: |
Complementary Index |
