I alas failed Keytruda for squamous cell carcinoma of the head and neck, in 2023; right now I'm on an antibody-drug conjugate from Seagen called PDL1V, which, as the name implies, also targets PD-L1: jakeseliger.com/2024/05…. May CT scans showed that it had shrunk tumors; scans from last week, though, appear to show tumors adapting to it as well.