Although diabetes did not cause significant rise of mortality, the IFNγ and IL-6 in COVID-19 patients with diabetes were significantly higher than those without diabetes (Figure 4A, 4B), while there were no significant differences in IL-2, IL-4, IL-10, TNF-α and IL-17a levels dependent with diabetes (Figure 4C–4G). Here, IFNG is linked to COVID-19.