[Does methotrexate influence the efficacy of vaccination against SARS-CoV-2?]

The question whether an ongoing treatment with methotrexate (MTX) actually impairs the protective immune response after SARS-CoV‑2 vaccination cannot be answered with certainty on the basis of the available data. However, in view of the fact that a short discontinuation (once or twice) of the weekly MTX treatment in patients with a stable disease situation is probably associated with a comparatively low risk of inducing a flare of the underlying inflammatory rheumatic disease, such a short discontinuation of treatment can be considered according to the individual decision involving the patient and the treating rheumatologist. Nevertheless, discontinuation of MTX treatment does not appear to be absolutely necessary-especially since discontinuation would have to occur twice within a short period of time for most COVID-19 vaccines. Under no circumstances should longer periods of discontinuation of treatment be considered as this could result in a flare of the underlying disease. A more detailed assessment of the data situation and the resulting consequences (also with respect to DMARD) will follow soon in the updated recommendations for action of the German Society for Rheumatology (DGRh) on the management of patients with inflammatory rheumatic diseases in the context of the SARS-CoV‑2 pandemic, especially COVID-19.