A Study to Evaluate the Activity, and Safety of Vixarelimab in Participants With Moderate to Severe Active Ulcerative Colitis

This study aims to evaluate the pharmacodynamic (PD) effects of vixarelimab in the gut of participants with active moderate to severe ulcerative colitis (UC).

Inclusion Criteria: * Diagnosis of UC established at least 3 months * Moderately to severely active UC * Participants must meet criteria for either advanced therapy failure or conventional therapy failure Exclusion Criteria: * Diagnosis of Crohn's disease or indeterminate colitis * Suspicion of ischemic colitis, radiation colitis, microscopic colitis or infectious colitis * Prior colectomy * Prior treatment with systemic janus kinase (JAK) inhibitors