On the other hand, in HEK293 cells, IL-6 was upregulated at comparable levels both in mRNA transcripts (Figures 6(a) and 6(b)) and concentrations (Figures 6(a) and 6(b)) in infections with miRT-H1N1, scbl-H1N1, or wt H1N1, indicating that proinflammatory cytokine IL-6 was induced distinctly with the mutant virus only in HBE cells. Here, IL6 is linked to infection.