A Multicenter, Open-Label Study to Assess The Pharmacokinetics And Safety of Bimekizumab in Pubertal Children And Adolescents With Moderate to Severe Hidradenitis Suppurativa

Inclusion Criteria: * Study participant must be 12 to \<18 years of age at the time of informed consent/assent, at Tanner stage 2 or more, for the first 8 participants only, followed by also including participants ≥9 to \<18 years of age at Tanner stage 2 or more. * Study participant must have a diagnosis of HS for at least 6 months prior to the Baseline Visit. * Study participant must have moderate to severe HS, defined as a total of ≥5 inflammatory lesions (ie, the sum of abscesses and inflammatory nodules), as assessed at both the Screening and Baseline Visits. * Study participant must hav…