Interestingly, one of the HERV-derived peptides included in our library was earlier found to be active in another tumor context (FLQFKTWWI; HERV-K-derived and HLA-A*02:01- and HLA-B*08:01-restricted, for which CD8+ T cell reactivity was detected in a study including patients with seminoma29). Here, HLA-A is linked to neoplasm.