Keywords: IBD biologic therapy; SARS-CoV-2; T-cell response; TCR clonal; antibody response; inflammatory bowel disease; vaccination.
T-cell and antibody responses to severe acute respiratory syndrome coronavirus 2 vaccination in inflammatory bowel disease patients are poorly correlated. T-cell responses are preserved by most biologic therapies, but augmented by anti-tumor necrosis factor (anti-TNF) treatment. While anti-TNF therapy blunts the antibody response, cellular immunity after vaccination is robust.