rates are in such considerable amount among large population base. The pathogenesis of COVID-19 implicates a potent inflammatory response, involving a complex group of mediators including interleukins. These pleiotropic cytokines are secreted at the region of inflammation and released into the circulation by a variety of different cell types, including macrophages, lymphocytes, endothelial cells, epithelial cells during sepsis and acute organ injuries. There has recently found a number of studies reporting that the cytokine storms take part in the course of COVID-19

Aim Of The Study

1. To evaluate if there is an association between the IL-17, IL-23 gene polymorphism in Patients With COVID 19 by real-time PCR
2. To measure the serum level of IL17 by ELISA in COVID 19 patients by ELISA.
3. To detect if there is an association between gene polymorphism of IL17 and IL23 and severity of a condition in patients with COVID 19 Study design: a cross-sectional study.

The blood samples will be collected from patient records in COVID19 isolation hospitals in sohag governorate and isolation department in sohag university hospitals.

Inclusion Criteria:

• Patients with Covid19 positive PCR

Exclusion Criteria:

• Patients with Covid19 clinical criteria not confirmed by PCR

group 1 patients with covid 19 with severe infections admitted at ICU group 2 patients with covid 19 with nonsevere infections admitted at internal wards

to protect the privacy of the patient