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Transpl Int. 2014 Feb;27(2):197-203. doi: 10.1111/tri.12237. Epub 2013 Dec 2.

Antibody persistence 1 year after pandemic H1N1 2009 influenza vaccination and immunogenicity of subsequent seasonal influenza vaccine among adult organ transplant patients.

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  • 1Transplant Institute, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.


We investigated the antibody persistence in solid organ transplant (SOT) recipients 1 year after immunization with two doses of monovalent AS03-adjuvanted influenza A(H1N1)pdm09 vaccine. We also assessed the boosting effect of the seasonal trivalent inactivated vaccine 2010 (TIV/10) that contained the influenza A(H1N1)pdm09 strain. A total of 49 SOT recipients and 11 healthy controls were included. After a blood sample was obtained to assess the persistent immunity, one dose of TIV/10 was administered and another blood sample was collected 1 month after vaccination. A(H1N1)pdm09 antibodies were measured using a haemagglutination inhibition assay. The percentage of SOT recipients with protective titres decreased between 1 month and 10-14 months after the monovalent influenza A(H1N1)pdm09 vaccination, from 79% (n = 38) to 47% (n = 23) (P = 0.02). The corresponding numbers for the control group were 100% and 63%, respectively (P = 0.008). After the TIV/10 boosting dose, the number of SOT recipients with protective titres increased from 47% (n = 23) to 71% (n = 35) (P = 0.2). All the controls reached a protective titre level. The median titre rise was significantly higher among controls when compared to SOT recipients (P = 0.0036). No rejection or adverse events were seen. The results show an obvious need for vaccine boosting doses in the SOT patients.


© 2013 Steunstichting ESOT. Published by John Wiley & Sons Ltd.


antibody response; cellular immune response; influenza A H11/09 vaccination; organ transplantation; trivalent influenza vaccine TIV/10

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