IL7 and COVID-19: Furthermore, the cytokine storms that are characterized by increased levels of interleukin-1 (IL-1), interleukin-6 (IL-6), interleukin-12 (IL-12), interferon y (IFN-γ), and tumor necrosis factor α (TNF-α) are a prominent feature of SARS-CoV-2 infection, and they contribute to tissue damage and inflammation; it should also be added that, in COVID-19 patients, there is a high level of interleukin-2 (IL-2), interleukin-4 (IL-4), interleukin-7 (IL-7), interleukin-10 (IL-10), interleukin-13 (IL-13), and interleukin-17 (IL-17) [31].