A Study to Assess the Safety, Tolerability, and Efficacy of Rocatinlimab in Adolescent Participants With Moderate-to-severe Atopic Dermatitis (AD)

Inclusion Criteria: * Age ≥ 12 to \< 18 years at day 1. * Participant has a diagnosis of AD (according to American Academy of Dermatology Consensus Criteria \[Eichenfield, 2014\]) that has been present for at least 12 months before signing of informed consent * Prior to informed consent, history of inadequate response to topical corticosteroids (TCS) of medium to higher potency (with or without topical calcineurin inhibitors \[TCI\] as appropriate) or for whom topical treatments are otherwise medically inadvisable (eg, because of important side effects or safety risks) * Eczema Area and Severity Index (EASI) score ≥ 12 * vIGA-AD score ≥ 3 * ≥ 10% BSA of AD involvement at day 1 pre-enrollment Exclusion Criteria: * Treatment with a biological product within 12 weeks or 5 half-lives, whichever is longer, prior to Day 1 * Treatment with any of the following medications or therapies within 4 weeks or 5 half-lives, whichever is longer, prior to Day 1: * Systemic corticosteroids * Systemic immunosuppressants * Phototherapy * Oral or topical janus kinase inhibitors * Treatment with any of the following agents within 1 week before day 1 pre-enrollment: * Topical PDE4 inhibitors * Other topical immunosuppressive agents (not including TCS/TCI) * Combination topical agents containing a high- or super-high potency corticosteroid