A plethora of studies have shown increased amounts of cytokines, such as interleukin-6 (IL-6), IL-7, IL-8, IL-9, IL-10, IL-1β, IL-1RA, tumor necrosis factor-alpha (TNF-α), granulocyte-macrophage colony-stimulating factor, fibroblast growth factor, macrophage inflammatory protein 1 alpha, platelet-derived growth factor, monocyte chemoattractant protein and vascular endothelial growth factor in the serum of COVID-19 patients, especially in ICU patients (Chen, Zhou, et al., 2020; Conti et al., 2020; Huang et al., 2020; Wang, Hu, et al., 2020; Zhang, Zhao, Zhang, et al., 2020).