Clin Exp Rheumatol
March 2023
Objectives: To investigate the humoral immune response and risk of disease flare in systemic lupus erythematosus (SLE) patients following three-doses of SARS-CoV-2 vaccines.
Methods: In adult patients with SLE, we measured SARS-CoV-2 spike IgG in blood samples drawn three weeks after the 1st dose (baseline), four and eight weeks after the 2nd dose and after the 3rd dose. A sufficient antibody response was ≥54BAU/mL.