Functions and pathways, such as heart development, brain development, and the insulin signaling pathway, etc. (Figures 7A–E), were also enriched for SARS-CoV-2 only, which can be targeted by the viral miRNAs, making the patients with previous complications more susceptible to COVID-19, and it can also lead to several signs uniquely found in SARS-CoV-2-infected patients. The gene discussed is INS; the disease is COVID-19.