HGF and coinfection: One of the mechanisms that may trigger KSHV reactivation, is the secretion of inflammatory cytokines, through activation of Toll-like receptors 7 and 8 (TLR7/8), oncostatin M (OSM), hepatocyte growth factor (HGF) and secretion of interferon-γ (IFN-γ) when stimulated by co-infection with other viruses [19,20].