Our finding showed that viral myocarditis,25 Leishmania infection,26 hematopoietic cell lineage,27 type I diabetes mellitus pathways, and type II diabetes mellitus pathways28 were enriched in patients with a higher expression of NCF2, MYO1F, S1PR4, and FCN1 in PBMCs. The gene discussed is FCN1; the disease is viral myocarditis.