The following will be done for enrolled patients:~Data collection: name, age, sex, special habits of medical importance (i.e. smoking, drug abuse), comorbid conditions.~Clinical examination Vital data Local chest examination~Measurement of oxygen saturation using pulse oximeter~Laboratory investigations:~Complete blood count with differential count Liver and kidney functions D-dimer level Coagulation profile~Radiology work up ( Chest X-ray-High resolution computed tomography of the chest- computed tomography of the chest with pulmonary angiography as needed)~Sepsis-induced coagulopathy score (SIC score)~Sequential organ failure score (SOFA score)~Patients will receive treatment according to the hospital guidelines for different disease stratification severity
evaluation of the efficacy and safety of D-dimer adjusted heparin versus therapeutic dose heparin in patients with COVID-19 Pneumonia.