Heatmaps of the differences in the expression levels of the genes listed as “role of hypercytokinemia/chemokinemia in the pathogenesis of influenza” between the four groups of ECs demonstrated that the expressions of CXCL10 (C‐X‐C motif chemokine ligand 10), EIF2AK2, DDX58, and IRF7 that were involved in the viral response were also highly expressed in the mid‐aged mice lung ECs (Figure 4c). This evidence concerns the gene CXCL10 and influenza.