Immunogenicity and Safety of Pneumococcal Vaccination in Patients Treated With Immune Checkpoint Inhibitors

This is a prospective observational study of vaccine efficacy and safety in adult patients with malignancies (melanoma/Hodgkin's lymphoma/Non-small cell lung cancer). The primary objective is to compare serotype specific immunoglobulin G (IgG) antibody titres before and after pneumococcal vaccination in patients receiving Immune Checkpoint Inhibitors (ICI). As an explorative objective, serotype specific IgG antibodies measured by ELISA and those measured by Opsonophagocytosis assay (OPA) after pneumococcal vaccination in patients receiving ICI will be correlated. In addition, the incidence of immune related adverse events (irAE) in patients vaccinated during ICI treatment will be determined.