Severe acute respiratory syndrome coronavirus 2 (COVID-19) poses substantial challenges for health care systems. With a vastly expanding amount of publications on COVID-19, clinicians need evidence synthesis to produce guidance for handling patients with COVID-19.

. Conavirus belongs to the subfamily of Ortho-coronavirinae in the family of Coronaviridae and the Order Nidovirales. In 2003, a SARS-CoV had caused the out- break of severe acute respiratory syndrome. In December 2019, an "unknown viral pneumonia" out- break has been reported. Finally, a novel coronavirus was detected, isolated virus was termed as SARS-CoV2, characterized as highly contagious and deadly. By the end of February 2020, more than 78,631 cases infected with SARS-CoV-2, and more than 2747 deaths were confrmed in China, and the COVID-19 has been declared a pan- demic by World Health Organization. For those infected by SARS-CoV-2, some of the patients didnot show hypoxemia or respiratory stress during the course of COVID-19, indicating a multifaceted disease of SARS-CoV-2 infection. Therefore, one reliable and convenient biomarker is needed to predict the severity of COVID-19 pneumonia. Recently, several studies have reported that C-reactive protein (CRP) is positively asso-ciated with severe dengue infection, and patients with higher plasma CRP in the initial period of dengue, are at higher risk to develop plasma leakage. We examined which routine laboratory tests are associated with severe COVID-19 disease, and the relation between the laboratory results and the security of COVID19 diasease, in two of large Upper Egypt medical centers, which are Aswan University and assiut university hospitals.

Inclusion Criteria:

• Age: all ages.
• Sex: Males and females.
• COVID-19 patients approved by positive PCR.

Exclusion Criteria:

• Patients with known chronic chest disease preceding the infection.

The study will be conducted on 100 patients with COVID-19 patients of all age groups and both sexes.