Dynamical models for CD8+ T‐cell control of influenza virus infection have also yielded important information about long‐term protective immunity.27, 28, 72 One study predicted that repeated exposure to influenza viruses promotes the plateauing of memory CD8+ T cells and that immediate protection from subsequent insults may be lost because memory cells residing in the lung decay after each infection.28 This may help explain why individuals experience multiple infections in their lifetime. The gene discussed is CD8A; the disease is infection.