Patients with difinit diagnosis of COVID-19 according to PCR Age between 30 to 60 years Having symptoms of cough and dyspnea Moderate to severe pulmonary involvement according to CT scan ( less than 50% pulmonary involvement according to CT scan) 3 weeks after positive PCR test No COPD disease No cardiac disease

Patients with difinit diagnosis of COVID-19 according to PCR Age between 30 to 60 years Having symptoms of cough and dyspnea Moderate to severe pulmonary involvement according to CT scan ( less than 50% pulmonary involvement according to CT scan) 3 weeks after positive PCR test No COPD disease No cardiac disease