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Casotti V, Stroppa P, Bravi M, Tebaldi A, Loglio A, Viganò M, Fagiuoli S, D'Antiga L. Vaccinations in Paediatric Solid Organ Transplant Candidates and Recipients. Vaccines (Basel) 2024; 12:952. [PMID: 39339984 PMCID: PMC11435986 DOI: 10.3390/vaccines12090952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2024] [Revised: 08/19/2024] [Accepted: 08/20/2024] [Indexed: 09/30/2024] Open
Abstract
Solid organ transplant (SOT) candidates and recipients are a fragile population, in which the presence of a pre-transplant disease leading to organ insufficiency and the post-transplant immunosuppressive treatment expose them to an increased risk of infectious diseases. The best intervention to guarantee efficient prevention of infections, with optimal cost-benefit ratio, is represented by vaccination programs; however, the response to vaccines needs that the immune system maintains a good function. This is even more relevant at paediatric age, when specific immunological conditions make transplant candidates and recipients particularly vulnerable. Paediatric patients may be naïve to most infections and may have incomplete immunization status at the time of transplant listing due to their age. Moreover, the unaccomplished development of a mature immune system and the immunosuppressive regimen adopted after transplant might affect the efficacy of post-transplant vaccinations. Therefore, every effort should be made to obtain the widest vaccination coverage before the transplantation, whenever possible. This review reports the most relevant literature, providing information on the current approach to the vaccinations in paediatric SOT candidates and recipients.
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Affiliation(s)
- Valeria Casotti
- Paediatric Hepatology, Gastroenterology and Transplantation, Child Health Department, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy
| | - Paola Stroppa
- Paediatric Hepatology, Gastroenterology and Transplantation, Child Health Department, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy
| | - Michela Bravi
- Paediatric Hepatology, Gastroenterology and Transplantation, Child Health Department, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy
| | | | - Alessandro Loglio
- Division of Gastroenterology, Hepatology and Transplantation, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy
| | - Mauro Viganò
- Division of Gastroenterology, Hepatology and Transplantation, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy
| | - Stefano Fagiuoli
- Division of Gastroenterology, Hepatology and Transplantation, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy
- Department of Medicine and Surgery, University of Milano-Bicocca, 20126 Milano, Italy
| | - Lorenzo D'Antiga
- Paediatric Hepatology, Gastroenterology and Transplantation, Child Health Department, ASST Papa Giovanni XXIII, 24127 Bergamo, Italy
- Department of Medicine and Surgery, University of Milano-Bicocca, 20126 Milano, Italy
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Heald-Sargent T, Michaels MG, Ardura MI. Pre-Transplantation Strategies for Infectious Disease Mitigation and Prevention. J Pediatric Infect Dis Soc 2024; 13:S3-S13. [PMID: 38417081 DOI: 10.1093/jpids/piad075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 09/22/2023] [Indexed: 03/01/2024]
Abstract
Pediatric Infectious Disease (ID) clinicians play a critical role in helping prevent and mitigate infectious risks in children peri- and post-transplantation. Prevention starts during the pre-transplant evaluation and persists throughout the solid organ transplant and hematopoietic cell transplant continuum. The pre-transplant evaluation is an opportunity to screen for latent infections, plan preventative strategies, optimize immunizations, and discuss risk mitigation practices. An ideal pre-transplant evaluation establishes a relationship with the family that further promotes post-transplant infectious risk reduction. This manuscript builds on shared pediatric ID prevention strategies, introduces updated ID testing recommendations for transplant donors/candidates, highlights emerging data, and identifies ongoing knowledge gaps that are potential areas of research.
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Affiliation(s)
- Taylor Heald-Sargent
- Department of Pediatrics, Division of Infectious Diseases, Northwestern University, Ann & Robert H. Lurie Children's Hospital, Chicago, Illinois, USA
| | - Marian G Michaels
- Department of Pediatrics, Division of Pediatric Infectious Diseases, University Pittsburgh School of Medicine, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Monica I Ardura
- Division of Pediatric Infectious Diseases & Host Defense Program, Nationwide Children's Hospital and Department of Pediatrics, The Ohio University College of Medicine, Columbus, Ohio, USA
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Condran B, Kervin M, Burton C, Blydt-Hansen TD, Morris SK, Sadarangani M, Otley A, Yong E, Mitchell H, Bettinger JA, Top KA. Parent and healthcare provider views of live varicella vaccination of pediatric solid organ transplant recipients. Pediatr Transplant 2023; 27:e14609. [PMID: 37746885 DOI: 10.1111/petr.14609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 07/28/2023] [Accepted: 09/01/2023] [Indexed: 09/26/2023]
Abstract
BACKGROUND Live attenuated varicella vaccine (LAVV) has historically been contraindicated in children who are immunocompromised due to solid organ transplant (SOT) because of safety concerns. Recently, clinical guidelines were developed that support post-transplant varicella vaccination in selected SOT recipients based on emerging evidence of LAVV safety. This qualitative study sought to explore barriers and facilitators to implementing the new guidelines, as well as acceptability of LAVV among healthcare providers (HCPs) and parents. METHODS HCPs and parents of transplant recipients were recruited from four sites using purposive sampling. Data from semi-structured interviews were analyzed using an Interpretive Description approach that incorporated data from the interviews, academic knowledge and clinical experience, and drew from Grounded Theory and Thematic Analysis. The theoretical framework used was Adaptive Leadership. RESULTS Thirty-four participants (16 HCPs and 18 parents) were included in the analysis. Parents developed skills in adaptive leadership that included strategies to protect their child against infectious diseases. Foundational information that live vaccines were absolutely contraindicated post-transplant "stuck" with parents and led them to develop strategies other than vaccination to keep their child safe. Some parents struggled to understand that information previously presented as a certainty (contraindication of LAVV) could change. Their approach to adaptive leadership informed their appraisal of the new vaccination guidelines and willingness to accept vaccination. CONCLUSIONS HCPs should adopt a family-centered approach to communicating changing guidelines that considers parents' approach to adaptive leadership and discusses the changing nature of medical evidence. Trust between HCPs and parents can facilitate these conversations.
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Affiliation(s)
- Brian Condran
- Canadian Center for Vaccinology, IWK Health, Halifax, Nova Scotia, Canada
| | - Melissa Kervin
- Canadian Center for Vaccinology, IWK Health, Halifax, Nova Scotia, Canada
| | - Catherine Burton
- Stollery Children's Hospital, University of Alberta, Edmonton, Alberta, Canada
| | - Tom D Blydt-Hansen
- Department of Pediatrics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Shaun K Morris
- Clinical Public Health and Centre for Vaccine Preventable Diseases, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
- Division of Infectious Diseases and Child Health Evaluative Sciences, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Manish Sadarangani
- Department of Pediatrics, University of British Columbia, Vancouver, British Columbia, Canada
- Vaccine Evaluation Center, BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada
| | - Anthony Otley
- Department of Pediatrics, Dalhousie University, Halifax, Nova Scotia, Canada
| | | | - Hana Mitchell
- Department of Pediatrics, University of British Columbia, Vancouver, British Columbia, Canada
- Vaccine Evaluation Center, BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada
| | - Julie A Bettinger
- Department of Pediatrics, University of British Columbia, Vancouver, British Columbia, Canada
- Vaccine Evaluation Center, BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada
| | - Karina A Top
- Canadian Center for Vaccinology, IWK Health, Halifax, Nova Scotia, Canada
- Department of Pediatrics, Dalhousie University, Halifax, Nova Scotia, Canada
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Piché-Renaud PP, Yue Lee E, Ji C, Qing Huang JY, Uleryk E, Teoh CW, Morris SK, Top KA, Upton JEM, Vyas MV, Allen UD. Safety and immunogenicity of the live-attenuated varicella vaccine in pediatric solid organ transplant recipients: A systematic review and meta-analysis. Am J Transplant 2023; 23:1757-1770. [PMID: 37321454 DOI: 10.1016/j.ajt.2023.06.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 06/06/2023] [Accepted: 06/07/2023] [Indexed: 06/17/2023]
Abstract
This study aimed to synthesize the available evidence on the immunogenicity, safety, and effectiveness of live-attenuated varicella vaccine in solid organ transplant recipients. Medline and EMBASE were searched using predefined search terms to identify relevant studies. The included articles reported varicella vaccine administration in the posttransplant period in children and adults. A pooled proportion of transplant recipients who seroconverted and who developed vaccine-strain varicella and varicella disease was generated. Eighteen articles (14 observational studies and 4 case reports) were included, reporting on 711 transplant recipients who received the varicella vaccine. The pooled proportion was 88.2% (95% confidence interval 78.0%-96.0%, 13 studies) for vaccinees who seroconverted, 0% (0%-1.2%, 13 studies) for vaccine-strain varicella, and 0.8% (0%-4.9%, 9 studies) for varicella disease. Most studies followed clinical guidelines for administering live-attenuated vaccines, with criteria that could include being at least 1 year posttransplant, 2 months postrejection episode, and on low-dose immunosuppressive medications. Varicella vaccination in transplant recipients was overall safe in the included studies, with few cases of vaccine-strain-induced varicella or vaccine failure, and although it was immunogenic, the proportion of recipients who seroconverted was lower than that seen in the general population. Our data support varicella vaccination in select pediatric solid organ transplant recipients.
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Affiliation(s)
- Pierre-Philippe Piché-Renaud
- Division of Infectious Diseases, the Hospital for Sick Children, Toronto, Ontario, Canada; Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada.
| | - Erika Yue Lee
- Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Division of Clinical Immunology and Allergy, St. Michael's Hospital, Toronto, Ontario, Canada; Eliot Phillipson Clinician Scientist Training Program, University of Toronto, Toronto, Ontario, Canada
| | - Catherine Ji
- Department of Family and Community Medicine, University of Toronto, Toronto, Ontario, Canada; Toronto Western Family Health Team, University Health Network, Toronto, Ontario, Canada
| | - Jenny Yu Qing Huang
- Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Division of Geriatric Medicine, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | | | - Chia Wei Teoh
- Department of Pediatrics, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; Division of Nephrology, the Hospital for Sick Children, Toronto, Ontario, Canada
| | - Shaun K Morris
- Division of Infectious Diseases, the Hospital for Sick Children, Toronto, Ontario, Canada; Department of Pediatrics, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; Centre for Global Child Health, the Hospital for Sick Children, Toronto, Ontario, Canada; Clinical Public Health, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | - Karina A Top
- Departments of Pediatrics and Community Health & Epidemiology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Julia E M Upton
- Division of Immunology and Allergy, Department of Paediatrics, the Hospital for Sick Children, Toronto, Ontario, Canada
| | - Manav V Vyas
- Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; Division of Neurology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Upton D Allen
- Division of Infectious Diseases, the Hospital for Sick Children, Toronto, Ontario, Canada; Department of Pediatrics, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
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Approaches to pretransplant vaccination. Curr Opin Organ Transplant 2022; 27:277-284. [PMID: 36354254 DOI: 10.1097/mot.0000000000000994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE OF REVIEW The aim of this study was to summarize new data and perspectives in pretransplant vaccination, with a particular focus on COVID-19 vaccination and vaccination requirements. RECENT FINDINGS Pretransplant vaccination produces superior markers of immunity and is expected to have greater clinical benefit, compared with posttransplant vaccination. As such, efforts are underway to identify and characterize barriers to pretransplant vaccination, with a particular focus on COVID-19 vaccine hesitancy. Unfortunately, vaccine hesitancy is common in transplant patients, often motivated by individual side effect and safety concerns. COVID-19 vaccination requirements have been implemented in some centres, informed by ethical principles, including beneficence, utility and justice. SUMMARY Barriers to pretransplant vaccination can be understood in three categories: hard stops, including issues of vaccine availability, eligibility, safety and feasibility; soft stops, including issues of convenience, prioritization and care coordination; and volitional stops related to vaccine hesitancy and refusal. All of these barriers present opportunities for improvement based on recent data.
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Daly KP, Sharma TS. Experience with Live Attenuated Varicella Vaccination in Pediatric Heart Transplant Recipients: Considering a New Path Forward. J Heart Lung Transplant 2022; 41:1027-1028. [DOI: 10.1016/j.healun.2022.03.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 03/27/2022] [Indexed: 10/18/2022] Open
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