Since the outset of the COVID-19 pandemic, numerous risk factors for severe disease have been identified. Whether patients with rheumatic diseases, especially those receiving DMARDs, are at an increased risk of SARS-CoV-2 infection or severe COVID-19 disease remains unclear, although epidemiological studies are providing some insight.
Patients with rheumatoid arthritis, systemic lupus erythematosus or psoriasis, when analysed as a combined group, might have a slightly increased risk of death from COVID-19 compared to those without these diseases, although the role of disease activity and treatment in this risk estimation was not taken into account 2 .
Treatment with cytokine inhibitors could reduce the risk of SARS-SoV-2 infection (as measured by development of SARS-CoV-2 antibodies), although the mechanisms of this protective effect are not clear 3 .
Chronic use of glucocorticoids at moderate or high doses (≥10 mg per day prednisolone or equivalent) is associated with hospitalization for severe COVID-19 4 .