"Data (from studies using TCR-F50/GIL/HLA-A2) suggest there are multiple solutions to recognizing identical peptide-MHC ligand with sufficient affinity to elicit broad anti- influenza virus response protective against viral escape. (TCR-F50 = GIL-specific T-cell receptor alpha-beta; HLA-A2 major histocompatibility complex class I A; GIL = immunodominant influenza A virus epitope from M1) [M1 matrix protein 1]"xsd:string