RecruitingPhase 2Drug trialA Study Evaluating Ficerafusp Alfa (BCA101) QW in Combination With Pembrolizumab vs Alternative Ficerafusp Alfa Dosing in 1L R or M HNSCCFicerafusp alfa is directed against two targets, Epidermal Growth Factor Receptor (EGFR) and Transforming Growth Factor beta (TGF-β). The study aims to demonstrate that the antitumor activity of an alternative dosing regimen of ficerafusp alfa in combination with pembrolizumab is comparable to the weekly ficerafusp alfa regimen in 1L PD-L1-positive, recurrent or metastatic Head and Neck Squamous Cell Carcinoma (HNSCC).