Regeneron: This phase II trial is evaluating the drug REGN2810 as a monotherapy for people with metastatic or locally advanced cutaneous squamous cell carcinoma (CSCC)A Phase 2 Study of REGN2810, a Fully Human Monoclonal Antibody to Programmed Death-1 (PD-1), in Patients With Advanced Cutaneous Squamous Cell Carcinoma

Exclusion

• Ongoing or recent (within 5 years) evidence of significant autoimmune disease that required treatment with systemic immunosuppressive treatments, which may suggest risk for immune-related adverse events
• Prior treatment with an agent that blocks the PD-1/PD-L1pathway
• Prior treatment with a BRAF inhibitor
• Prior treatment with other immune-modulating agents within fewer than 4 weeks prior to the first dose of cemiplimab, or associated with immune-mediated adverse events that were ≥ grade 1 within 90 days prior to the first dose of cemiplimab, or associated with toxicity that resulted in discontinuation of the immune-modulating agent. Examples of immune-modulating agents include therapeutic vaccines, cytokine treatments, or agents that target cytotoxic T-lymphocyte antigen 4 (CTLA-4), 4-1BB (CD137), or OX-40.
• Untreated brain metastasis(es) that may be considered active
• Immunosuppressive corticosteroid doses (>10 mg prednisone daily or equivalent) within 4 weeks prior to the first dose of cemiplimab
• Infection with human immunodeficiency virus (HIV) and/or chronic/active infection with hepatitis B virus or hepatitis C virus
• History of non-infectious pneumonitis within the last 5 years
• Allergic reactions or acute hypersensitivity reaction attributed to antibody treatments
• Known allergy to doxycycline or tetracycline
• Patients with a history of solid organ transplant
• Any medical co-morbidity, physical examination finding, or metabolic dysfunction, or clinical laboratory abnormality that renders the patient unsuitable

Other protocol-defined inclusion/exclusion criteria apply