Heterologous high dose SARS-CoV-2 mRNA vaccine booster may improve immune response in seronegative kidney transplant recipients
ARCHIVES OF MEDICAL SCIENCE(2022)
Abstract
Introduction: Three-dose mRNA vaccination against COVID-19 is unable to elicit a sufficient immune response in immunocompromised subjects. Methods: The aim of the study was to conduct a retrospective evaluation of the efficacy of a heterologous mRNA booster with mRNA-1273 in constantly seronegative kidney transplant recipients (KTRs) after three doses of the BNT162b2 mRNA vaccine. Twelve seronegative KTRs received a mRNA-1273 booster 5 months after the third dose of BNT162b2. Results: A total of 5 out of 12 patients (41.7%) seroconverted, with a mean titer of 353 BAU/ml. Conclusions: The administration of a heterologous mRNA vaccine as a booster may be an effective alternative for achieving post-vaccination immunity in seronegative KTRs.
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Key words
COVID-19,humoral response,mRNA vaccine,kidney transplant recipients
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