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. 2023 Aug;25(4):e14098.
doi: 10.1111/tid.14098. Epub 2023 Jul 10.

Compliance with yellow fever and measles vaccines in the revaccination program post-hematopoietic cell transplantation

Lucia H de Almeida Testa  1 , Anderson J Simione  1 , Ana Claudia F Dos Santos  1 , Iago Colturato  1 , Fernanda Barbieri  1 , Mair Pedro de Souza  1 , Vergilio R Colturato  1 , Clarisse M Machado  1   2
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Compliance with yellow fever and measles vaccines in the revaccination program post-hematopoietic cell transplantation

Lucia H de Almeida Testa et al. Transpl Infect Dis. 2023 Aug.

Abstract

Introduction: Measles, mumps, rubella, and even poliomyelitis outbreaks have recently perplexed infectious disease clinicians and epidemiologists globally due to the decline in vaccination coverage rates in children and adults. Measles and yellow fever (YF) have represented an increasing burden on the Brazilian public health system in recent decades. Both diseases are preventable by live-attenuated viral vaccines (LAVV), which have restricted use in hematopoietic cell transplant (HCT) recipients.

Methods: Autologous and allogeneic HCT recipients returning for regular appointments at the outpatient clinic were invited to participate in the study. Patients transplanted for at least 2 years and with a printed copy of the vaccination record were included.

Results: We assessed the vaccination records of 273 HCT recipients after the second year of HCT (193 allogeneic and 80 autologous) and observed lower compliance with the YF vaccine (58 patients, 21.2%) than with the measles vaccine (138 patients, 50.5%, p ≤ .0001). This is the largest published series of YF vaccination in HCT recipients so far. No severe adverse events occurred. Although expected, chronic graft-versus-host disease (GVHD) did not affect the compliance with measles (p = .08) or YF vaccination (p = .7). Indeed, more allogeneic recipients received measles vaccine in comparison with autologous patients (p < .0001), suggesting that chronic GVHD was not the main reason for not being vaccinated. Children and allogeneic HCT were more likely to receive measles vaccine. Time elapsed from HCT >5 years favored both measles and YF vaccination.

Conclusion: A better understanding of the reasons for low compliance with LAVV is necessary to overcome this problem.

Keywords: HCT; compliance; live-attenuated vaccine; measles; vaccination; yellow fever.

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References

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