IAV‐specific CD8+ cytotoxic T lymphocytes and IFN‐γ‐producing CD4+ T lymphocytes promote clearance of IAV and recovery from infection.5 Intranasal HA–SF–10 activated IFN‐γ‐producing lymphocytes in the nasopharynx and NALT and probably stimulated cellular immunity against IAV. Here, CD8A is linked to infection.