IL19 and COVID-19: Here, by using gene expression data sets of AECs infected with SARS-CoV-2, SARS-CoV-1, IAV, or RSV infection of AECs, we found that in vitro, IL-19 cytokine is upregulated to a higher-level during SARS-CoV-2 infection than following any other respiratory viral infections (Fig. 5A, log-fold of 1.71 ± 0.5 compared to SARS-CoV-1 and RSV; P = 0.027).