Abstract
ObjectiveThe aim of this study was to determine and evaluate the postvaccination variation in immunoglobulin G (IgG) receptor-binding domain (RBD) produced in non-SARS-CoV-2–infected patients with nephropathy and renal replacement therapy. MethodsThis is a follow-up study of the humoral response to the BNT162b2 messenger ribonucleic acid COVID-19 vaccine in patients with nephropathy, comparing it with itself at different times and with the healthy population. ResultsIn patients with nephropathy, a very striking decrease in IgG RBD was observed compared with the healthy population (P<0.001) at three months after the second dose. In patients with nephropathy, the response rate ≥590 binding antibody units/ml (4154 AU/ml) was detected in 45% of patients, 15 days after the second dose, whereas at 3 months, this decreased to 9% (P<0.05) and then increased to 86% after the third dose (P<0.001). ConclusionIn patients with nephropathy and renal replacement therapy, it is necessary to administer a third-dose vaccination within 3 months after the second dose. It is important to continue monitoring the humoral response to obtain a better SARS-CoV-2 vaccination schedule.
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