Clinical Research Directory

Inclusion Criteria: 1. Participants with alopecia areata (AA) (including alopecia totalis \[AT\] and alopecia universalis \[AU\]) who completed the studies B7981027 or B7981031. 2. For participants originating from Study B7981031: At least 50% scalp hair loss due to AA (ie, a SALT score of ≥50) at both the Screening and Baseline visits. Exclusion Criteria: 1. Exclusion criteria for participants originating from Study B7981027 with ≤ 30 Days between last dose in Study B7981027 and first visit of Study B7981028 1. During Study B7981027 or in the period between the last dose of study intervention in Study B7981027 and the first dose of study intervention of Study B7981028, presence of safety events that would require permanent discontinuation based on the B7981028 protocol. 2. Study participants discontinued from Study B7981027 due to issues other than safety-related events and considered by the investigator for enrolment in Study B7981028 must have resolution of the issue(s) resulting in discontinuation from the parent study prior to enrolment in Study B7981028. 2. Exclusion criteria for participants originating from Study B7981031 or from Study B7981027 with \>30 Days between last dose in Study B7981027 and first visit of Study B7981028 1. During Study B7981031 or Study B7981027 or in the period between the last dose of study intervention in Study B7981031 or Study B7981027 and the first dose of study intervention of Study B7981028, presence of safety events that would require permanent discontinuation based on the B7981028 protocol. 2. Any present malignancies or history of malignancies or lymphoproliferative disorders. 3. Evidence of untreated or inadequately treated active or latent Mycobacterium tuberculosis (TB) infection, history (one or more episodes) of severe or serious cytomegalovirus (CMV), herpes zoster (shingles) or disseminated herpes simplex, infection with hepatitis B virus (HBV) or hepatitis C virus (HCV). \-