IL7 and COVID-19: Furthermore, Huang et al. commented on the role of interleukin- (IL-) 2, IL-7, granulocyte-colony stimulating factor, interferon-γ-inducible protein 10, monocyte chemoattractant protein 1, macrophage inflammatory protein 1-α, and tumor necrosis factor-α in ICU admitted cases of COVID-19 versus non-ICU cases [51].