Examples of these include transforming growth factor (TGF), insulin-like growth factor (IGF), fibroblast growth factor (FGF), vascular endothelial growth factor (VEGF), keratinocyte growth factor (KGF), and platelet derived growth factor (PDGF), that collectively help induce differentiation of immune cells to clear debris and fight infection, stimulate growth, promote formation of new blood vessels, and release inflammatory mediators [3]. This evidence concerns the gene VEGFA and infection.