Inclusion Criteria:  All patients were diagnosed with COVID-19 by polymerase chain reaction (PCR) test of a nasopharyngeal sample during acute phase, completed CBC, lymphocyte inflammatory marker, c-reactive protein and ESR. Patients must be negative polymerase chain reaction (PCR). Patients will be completely recovered from acute symptoms of covid-19. Patients will be recruited after 2- 4 weeks post complete recovery from acute symptoms  Exclusion Criteria:  • Patients with feverish systemic or local bacterial infections.  Epilepsy. Pregnant women patients. Cancer. Uncontrolled Diabetes milletus >250 mg/dl