Tweet
PLoS One
. 2025 Sep 18;20(9):e0332346.
doi: 10.1371/journal.pone.0332346. eCollection 2025. Immunogenicity of one dose and two doses of adjuvanted influenza vaccine in lung transplant candidates
Valentina Polishchuk 1 , Мikhail Kostinov 1 2 , Аleksey Ryzhov 1 , Yulia Dagil 3 , Izabella Khrapunova 2 , Alexander Zhestkov 4 , Evgeny Tarabrin 5 , Natalia Karchevskaya 6 , Anna Vlasenko 7 , Aristitsa Kostinova 2 , Arseniy Poddubikov 8 , Irina Solovieva 9 , Anna Khamidulina 9 , Ekaterina Prutskova 9 , Irina Mekhantseva 10
Affiliations
Influenza is especially dangerous for high-risk patients, for whom various vaccination strategies are used to prevent this disease. This study assessed the safety and immunological effectiveness of an inactivated trivalent polymer-subunit influenza vaccine Grippol® Plus administered according to two regimens in a group of 41 patients with severe progressive bronchopulmonary disorders. It also investigated the duration of vaccine-induced antibody response in this patient population. Group 1 of the study subjects (n = 21) received one dose of Grippol® Plus, and Group 2 (n = 20) received two doses of Grippol® Plus one month apart in the same influenza season. To measure antibody levels, paired sera were tested in hemagglutination inhibition assay pre-vaccination and at months 1 and 12 post-vaccination. Vaccine immunogenicity was assessed by the Committee for Medicinal Products for Human Use (CHMP) criteria. All patients were symptom-free in the post-vaccination period. The one-dose regimen met all CHMP criteria against strains A/California/7/2009(H1N1)pdm09-like and A/Texas/50/2012(H3N2) and the criteria for seroprotection and seroconversion against the B/Massachusetts/2/2012 strain. This regimen was associated with a significant increase in Ab titers against all the three influenza viral strains. In the two-dose group, no statistically significant differences were observed in IgG Ab levels, seroprotection rate, seroconversion rate or seroconversion factor at month 1 after the first and second vaccine doses. At month 12 post-vaccination, Ab levels returned to baseline, regardless the vaccination regimen. In lung transplant candidates, one-dose vaccination with an inactivated trivalent polymer-subunit influenza vaccine was effective in generating protective antibody levels for the current influenza season.
. 2025 Sep 18;20(9):e0332346.
doi: 10.1371/journal.pone.0332346. eCollection 2025. Immunogenicity of one dose and two doses of adjuvanted influenza vaccine in lung transplant candidates
Valentina Polishchuk 1 , Мikhail Kostinov 1 2 , Аleksey Ryzhov 1 , Yulia Dagil 3 , Izabella Khrapunova 2 , Alexander Zhestkov 4 , Evgeny Tarabrin 5 , Natalia Karchevskaya 6 , Anna Vlasenko 7 , Aristitsa Kostinova 2 , Arseniy Poddubikov 8 , Irina Solovieva 9 , Anna Khamidulina 9 , Ekaterina Prutskova 9 , Irina Mekhantseva 10
Affiliations
- PMID: 40966213
- PMCID: PMC12445457
- DOI: 10.1371/journal.pone.0332346
Influenza is especially dangerous for high-risk patients, for whom various vaccination strategies are used to prevent this disease. This study assessed the safety and immunological effectiveness of an inactivated trivalent polymer-subunit influenza vaccine Grippol® Plus administered according to two regimens in a group of 41 patients with severe progressive bronchopulmonary disorders. It also investigated the duration of vaccine-induced antibody response in this patient population. Group 1 of the study subjects (n = 21) received one dose of Grippol® Plus, and Group 2 (n = 20) received two doses of Grippol® Plus one month apart in the same influenza season. To measure antibody levels, paired sera were tested in hemagglutination inhibition assay pre-vaccination and at months 1 and 12 post-vaccination. Vaccine immunogenicity was assessed by the Committee for Medicinal Products for Human Use (CHMP) criteria. All patients were symptom-free in the post-vaccination period. The one-dose regimen met all CHMP criteria against strains A/California/7/2009(H1N1)pdm09-like and A/Texas/50/2012(H3N2) and the criteria for seroprotection and seroconversion against the B/Massachusetts/2/2012 strain. This regimen was associated with a significant increase in Ab titers against all the three influenza viral strains. In the two-dose group, no statistically significant differences were observed in IgG Ab levels, seroprotection rate, seroconversion rate or seroconversion factor at month 1 after the first and second vaccine doses. At month 12 post-vaccination, Ab levels returned to baseline, regardless the vaccination regimen. In lung transplant candidates, one-dose vaccination with an inactivated trivalent polymer-subunit influenza vaccine was effective in generating protective antibody levels for the current influenza season.