Age over 18 years Getting infected with covid 19 disease (SARS_COV_2 PCR POSITIVE) Patients who are hospitalized in the course of the disease Spo2 under 90% On the CT scan of lung, the evidences of covid 19 are presented Not being admitted at the ICU, on the first visit, at the start of ozone therapy

Age over 18 years Getting infected with covid 19 disease (SARS_COV_2 PCR POSITIVE) Patients who are hospitalized in the course of the disease Spo2 under 90% On the CT scan of lung, the evidences of covid 19 are presented Not being admitted at the ICU, on the first visit, at the start of ozone therapy