Recurrent/Metastatic Head and Neck Cancer

This study is a Phase Ib/II study of TQB2922 injection (subcutaneous). In the Phase Ib stage, a 3+3 dose-escalation design was used to determine the RP2D and pharmacokinetic characteristics of TQB2922 injection (subcutaneous) administered once every 3 weeks in subjects with R/M HNC. The Phase II stage explored the efficacy and safety of TQB2922 (subcutaneous) as monotherapy or in combination therapy in subjects with R/M HNC.