Regarding COVID-19, eight studies showed increased IL-1β, IL-6, and TNF-α in these cases compared to the controls [18,19,34,35,36,37,38,39], five studies showed elevated IL-6 alone, and one study indicated higher TNF-α alone (Figure 3b) [40,41,42,43,44,45]. This evidence concerns the gene IL6 and COVID-19.