IL7 and susceptibility to pneumonia measurement: Elevations in plasma cytokines including IL-1β, IL-1RA, IL-7, IL-8, IL-9, IL-10, bFGF, GCSF, GM-CSF, IFN-γ, IP-10, CCL2, CCL3, CCL4, PDGF, TNF-α, and VEGF have been reported in COVID-19 cases requiring hospitalization for pneumonia, and IL-2, IL-7, IL-10, G-CSF, IP-10, CCL2, CCL3, and TNF-α were shown to be higher in patients admitted to the ICU [72].