Stimulating T cells with SARS-CoV-2 (Spike Protein) Delta/B.1.617.2 Mutation Peptide pool releases downstream cytokines and upregulates activation markers, enabling antigen-specific T cells to be detected or isolated for analysis. This peptide pool is a lyophilised mixture of 27 peptides from the spike glycoprotein of the SARS-CoV-2 Delta variant (B.1.617.2) that selectively cover the mutated regions in the spike protein. Through interactions with the angiotensin-converting enzyme 2 (ACE2) receptor, the spike protein enables the virus to attach to the cell membrane, and plays a critical role in viral entry (Hoffmann et al.; Walls et al.). Viral peptide pools are useful for a broad range of applications, including vaccine development, immunological research, and diagnostic assay development.