Inflammatory bowel disease(37) SARS-CoV-2(18) vaccination(17) COVID-19(16) IBD(15) herpes zoster(15) ulcerative colitis(14) Tofacitinib(12) infliximab(11) ulcerative colitis.(11) vaccination.(11) Crohn’s disease(10) biologic(10) Antibody Response(9) immunization(9) response(9) age(8) Inflammatory(7) Abstract(7) bowel(7) antibody(7) vedolizumab.(6) SARS-COV-2 infection(6) number needed to harm(6) Patient(6) therapy(6) disease(6) clinical symptom(5) IgG antibody(5) RBD IgG(5)