An Exploratory Single-arm Study: PD-1 With Recombinant Human Adenovirus Type 5 Injection for Malignant Melanomas

The study is divided into 5 phases: screening phase, washout phase, baseline phase, treatment phase and follow-up phase. Patients with advanced malignant melanoma who are eligible for screening and have failed previous anti-PD1 antibody therapy and who meet the inclusion exclusion criteria undergo elution with 1 PD1 monoclonal antibody injection, patients whose tumours progress after PD1 monoclonal antibody injection enter the treatment phase and are followed up every 1 month for at least 2 years in the follow-up phase.