OVA-specific CD8+ T-cell responses were measured by flow cytometry analysis of mouse peripheral blood stained with PE-labelled H-2Kb/OVASIINFEKL (OVAI) peptide (PE-tetramer) and FITC-labelled anti-CD8+ antibody (FITC-CD8) at 7, 15, 30 and 60 d post infection. Here, CD8A is linked to infection.