It is noteworthy that the severity of COVID-19 in certain cases seems to also relate to predisposition for developing a cytokine storm syndrome with excessive release of pro-inflammatory cytokines (e.g., tumor necrosis factor-α, chemokines, and interleukins such as IL-6, IL-7, IL-8, IL-2, and IL-1β) at the infected lung tissue [40, 41]. This evidence concerns the gene IL6 and COVID-19.