Antibody responses to single‐dose SARS‐CoV‐2 vaccination in patients receiving immunomodulators for immune‐mediated inflammatory disease

There are few data on whether immunomodulator therapy attenuates humoral response to vaccines for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Some vaccines require two doses for maximum protection, with international variation in dosing schedules. A 3 month interval between doses is being used in the U.K. We evaluated antibody titres to SARS-CoV-2 following initial-dose BNT162b2 (Pfizer/BioNTech) or AZD1222 (AstraZeneca) vaccines in adults with psoriasis and other immune-mediated inflammatory diseases (IMIDs) receiving biologic and/or oral non-biologic immunomodulators.