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Influence of Methotrexate Discontinuation on Immunogenicity After PCV-20 Vaccine in Patients ARDs

University of Sao Paulo General Hospital · 2026
ClinicalTrials.gov · Datasets · License: Public Domain · 2026
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immunogenicityrheumatologyvaccination
This clinical trial aims to evaluate the effect of temporary methotrexate (MTX) discontinuation on the humoral immunogenicity of the 20-valent pneumococcal conjugate vaccine (PCV20) in adult patients with autoimmune rheumatic diseases (ARDs). Key questions: * Does suspending MTX for 2 weeks after PCV20 enhance humoral immunogenicity? * What is the impact of MTX discontinuation on functional opsonophagocytic activity (OPA) and cellular immunity? * What is the risk of disease flaring with MTX withdrawal?
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