Libtayo was the sixth PD-L/PD-L1 inhibitor to reach the market, starting out as a therapy for another skin cancer called cutaneous squamous cell carcinoma (CSCC), and the rarity of that disease ...

Regeneron and Sanofi’s PD-1 inhibitor Libtayo will be tested in tandem with a cancer vaccine developed by BioNTech in melanoma in people who have failed treatment with other checkpoint inhibitors.