CD4 and respiratory system disorder: This balanced response is crucial for effective viral clearance and may reduce the risk of vaccine‐enhanced respiratory diseases.[53] Furthermore, we demonstrated the induction of polyfunctional T‐cell responses, including a significant increase in the frequencies of antigen‐specific CD4+ and CD8+ T cells producing IFN‐γ, IL‐2, TNF‐α, and IL‐17 A in both spleen and lungs.