Our results are also in agreement with Taghiloo et al. who have been reported that, the serum levels of TNF-α and INF-γ were significantly higher in COVID-19 group compared to controls, but they disagree with our findings about serum level of IL-10 as they found that the increase in level of IL-10 was statistically non-significant38. This evidence concerns the gene IL10 and COVID-19.